Thermal runaway flue gas treatment device

Abstract

The utility model provides a thermal runaway flue gas treatment device which mainly solves the problem that potential safety hazards exist when thermal runaway flue gas is treated by an existing thermal runaway flue gas treatment device. The thermal runaway flue gas treatment device comprises an outer shell, an ignition assembly and a combustion shell, the combustion shell is arranged above the outer shell, and a combustion area is formed by the combustion shell and a top plate of the outer shell; the outer shell is provided with a plurality of flue gas channels penetrating in the longitudinal direction of the outer shell, and the multiple flue gas channels communicate with the combustion area and are used for dispersing thermal runaway flue gas and introducing the thermal runaway flue gas into the combustion area. The ignition assembly is used for igniting the thermal runaway flue gas dispersedly introduced into the combustion area to form a plurality of dispersive combustion points, and the thermal runaway flue gas treatment device reduces the flame height during combustion of the thermal runaway flue gas by arranging the multiple dispersive combustion points, effectively controls the combustion flame of the thermal runaway flue gas within a certain range, and improves the combustion efficiency of the thermal runaway flue gas. And the use safety of the whole thermal runaway flue gas treatment device is improved.

Description

Technical Field

[0001] The utility model belongs to the field of battery safety, and in particular relates to a thermal runaway smoke treatment device. Background Art

[0002] Lithium-ion batteries are widely used in energy storage, power batteries and other fields. With the further development of lithium-ion batteries in recent years, the safe use of lithium-ion batteries has also attracted attention. Due to the principles and structural characteristics of lithium-ion batteries, under the influence of factors such as overcharge, overdischarge, overheating, and mechanical collision, it is easy to cause battery diaphragm collapse and internal short circuit, thus leading to thermal runaway.

[0003] After the lithium-ion battery goes into thermal runaway, a large amount of thermal runaway smoke is generated. At present, when treating the thermal runaway smoke, the thermal runaway smoke is first concentrated and led out, and then the corresponding treatment device is used to treat the thermal runaway smoke. Chinese patent CN216563420U discloses a battery thermal runaway smoke treatment device, which is arranged at the smoke outlet end of the PACK box, and mainly includes a smoke ignition device and a trigger device. The smoke ignition device is used to ignite the smoke discharged from the thermal runaway of the PACK box; the trigger device triggers the smoke ignition device to ignite through the smoke pressure discharged from the smoke outlet end of the PACK box.

[0004] When multiple batteries in the above-mentioned PACK box have thermal runaway, a large amount of thermal runaway smoke will be generated. When the thermal runaway smoke burns, a large amount of burning flames will be generated. A large amount of burning flames will easily lead to flame out of control and ignite the surrounding combustibles. In addition, a large amount of burning flames may also affect the devices near the ignition device. Therefore, the existing thermal runaway smoke treatment device has certain safety hazards. Utility Model Content

[0005] In order to solve the problem that the existing thermal runaway flue gas treatment device has potential safety hazards when treating thermal runaway flue gas, the utility model provides a thermal runaway flue gas treatment device.

[0006] In order to achieve the above object, the technical solution of the utility model is:

[0007] The thermal runaway flue gas treatment device provided by the utility model comprises an outer shell, an ignition assembly and a combustion shell; the combustion shell is arranged above the outer shell to form a combustion zone with the top plate of the outer shell; a plurality of flue gas passages which penetrate in the longitudinal direction are arranged on the side wall of the outer shell, and the plurality of flue gas passages are all connected to the combustion zone to disperse the thermal runaway flue gas into the combustion zone; the ignition assembly is used to ignite the thermal runaway flue gas which is dispersedly introduced into the combustion zone to form a plurality of dispersed combustion points.

[0008] Furthermore, the smoke passage is a through hole provided on the side wall of the outer shell and penetrating the outer shell in the longitudinal direction, and the number of the smoke passage is 4 to 10.

[0009] Furthermore, the flue gas channel includes a mixing channel and a first channel which are sequentially connected from top to bottom, the mixing channel is connected to the combustion zone, and an oxygen mixing port connected to the external environment is provided on the mixing channel.

[0010] Further, the cross-sectional dimension of the first channel is smaller than the cross-sectional dimension of the mixing channel, and the length of the first channel is greater than the length of the mixing channel.

[0011] Furthermore, the ignition assembly includes a trigger and an igniter; the igniter includes an ignition needle, a high-voltage package and a circuit board, the ignition needle is arranged in the combustion zone, and the trigger, the high-voltage package and the circuit board are arranged in the inner cavity of the shell.

[0012] Furthermore, the trigger is an airflow sensor, and the airflow sensor is an electronic cigarette microphone, which is installed at the bottom of the inner cavity of the shell.

[0013] Furthermore, a partition is arranged in the combustion zone, and the partition and the top plate of the outer shell form a smoke cavity. The partition is provided with a plurality of smoke holes connected to the smoke cavity, and the central axis of the smoke hole is staggered with the central axis of the smoke channel. The partition is provided with a fire-blocking net covering the smoke hole.

[0014] Furthermore, the combustion shell and the outer shell are an integrated structure.

[0015] Furthermore, it also includes a fireproof cover, which is sleeved on the outside of the combustion shell, and the side wall and top of the fireproof cover are provided with a plurality of air holes.

[0016] Furthermore, the fireproof cover is installed on the combustion shell through an elastic component, and the elastic component includes a compression spring and two bimetallic clips, one end of the bimetallic clip is connected to the combustion shell, and the other end is connected to the fireproof cover, one end of the compression spring is connected to the combustion shell, and the other end is connected to the fireproof cover, the bimetallic clip is disengaged from the combustion shell after being deformed by heat, and the fireproof cover pops up under the action of the compression spring.

[0017] Compared with the prior art, the technical solution of the utility model has the following advantages:

[0018] 1. The outer shell of the thermal runaway flue gas treatment device of the utility model is provided with a plurality of flue gas channels, and the plurality of flue gas channels disperse the thermal runaway flue gas into the combustion zone, and the thermal runaway flue gas is dispersedly ignited to form a plurality of combustion points. By setting a plurality of dispersed combustion points, the flame height of the thermal runaway flue gas during combustion can be effectively reduced, so as to control the combustion flame within a certain height range, thereby improving the safety of the entire thermal runaway flue gas treatment device during use.

[0019] 2. In the thermal runaway flue gas treatment device of the utility model, the flue gas channel includes a mixing channel and a first channel which are connected in sequence from top to bottom. The oxygen mixing port transports external air into the mixing channel, which is mixed with the thermal runaway flue gas input from the first channel and then transported to the combustion zone for combustion. This method of mixing the thermal runaway flue gas with oxygen before ignition makes the combustion of the thermal runaway flue gas more complete and the height of the combustion flame is further reduced.

[0020] 3. In the thermal runaway flue gas treatment device of the utility model, the cross-sectional dimension of the first channel is smaller than the cross-sectional dimension of the mixing channel, and the length of the first channel is larger than the length of the mixing channel. This arrangement can not only increase the size of the oxygen mixing port and ensure the flue gas oxygen mixing ratio, but also, since the first channel and the mixing channel are both structures similar to capillaries, the capillaries can increase the flow velocity of the thermal runaway flue gas and ensure that the thermal runaway flue gas can be better mixed with oxygen. Better oxygen mixing can make the thermal runaway flue gas burn more fully, reduce the generation of yellow flames, and even achieve flameless combustion.

[0021] 4. In the thermal runaway flue gas treatment device of the present invention, the flue gas channel is a through hole arranged on the side wall of the outer shell and passing through it longitudinally. The flue gas channel of this structure is relatively simple to manufacture and process, and the appearance of the outer shell is relatively beautiful.

[0022] 5. In the thermal runaway flue gas treatment device of the utility model, the high-voltage package, circuit board, dry battery and trigger of the igniter are arranged in the inner cavity of the outer shell. This installation method can not only protect the high-voltage package, circuit board, dry battery and trigger to avoid damage caused by installing them outside the outer shell during use or transportation, but also make full use of the internal space of the outer shell to realize the integrated installation of various components and reduce the installation space of the entire device.

[0023] 6. In the thermal runaway smoke treatment device of the utility model, the trigger is an airflow sensor, which is arranged at the bottom of the inner cavity of the outer shell, and can directly meet the direct triggering of the thermal runaway smoke, ensuring that the igniter can be triggered timely and reliably after the battery thermal runaway smoke.

[0024] 7. In the thermal runaway flue gas treatment device of the utility model, a partition is arranged in the combustion zone, and the partition and the top plate of the outer shell form a smoke cavity, which has a certain buffering effect on the thermal runaway flue gas, thereby preventing the flame at the combustion point from being extinguished when the instantaneous pressure of the thermal runaway flue gas is too high.

[0025] 8. In the thermal runaway flue gas treatment device of the utility model, the combustion shell and the outer shell are set as an integrated structure. The integrated structure can prevent heat or flame from leaking from the connection when the thermal runaway flue gas burns, and also omits the process of on-site assembly and disassembly.

[0026] 9. In the thermal runaway flue gas treatment device of the utility model, a fireproof cover is also installed on the outside of the combustion shell, which can prevent the combustion flame from overflowing and isolate the heat generated during combustion, thereby further improving the safety of the device when in use.

[0027] 10. In the thermal runaway flue gas treatment device of the utility model, the fireproof cover is installed on the combustion shell through an elastic component. The buckle in this structure is made of bimetal. The bimetal buckle cooperates with the compression spring to make the outer fireproof cover pop up after the thermal runaway flue gas burns. After the fireproof cover pops up, the height of the combustion zone is increased to avoid the instantaneous large flame and flame spillage when the thermal runaway flue gas burns.

[0028] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 The structure of the thermal runaway flue gas treatment device in the embodiment is shown in FIG. Figure 1 ;

[0031] Figure 2 The structure of the thermal runaway flue gas treatment device in the embodiment is shown in FIG. Figure 2 ;

[0032] Figure 3 is a cross-sectional view of the outer shell in the embodiment;

[0033] Figure 4 is a cross-sectional view of a thermal runaway flue gas treatment device in an embodiment;

[0034] Figure 5 It is a schematic structural diagram of a thermal runaway flue gas treatment device (with a fireproof cover) in an embodiment;

[0035] Figure 6 It is a schematic structural diagram of a thermal runaway flue gas treatment device (with an elastic component) in an embodiment;

[0036] Figure 7 It is a cross-sectional view of the thermal runaway flue gas treatment device (with a fireproof cover) in the embodiment.

[0037] Figure markings: 1-outer shell, 2-combustion shell, 3-ignition assembly, 4-partition, 5-fireproof cover, 6-elastic assembly, 11-top plate, 12-smoke channel, 13-external threaded section, 121-first channel, 122-mixing channel, 123-oxygen mixing port, 21-combustion zone, 31-ignition needle, 32-high-voltage package, 33-circuit board, 34-trigger, 35-dry battery, 41-smoke hole, 42-fireproof net, 43-smoke cavity, 51-air hole, 61-compression spring, 62-bimetallic buckle. DETAILED DESCRIPTION

[0038] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary persons in the field without creative work should fall within the scope of protection of the utility model.

[0039] The "other embodiments" that appear in different places in this specification do not all refer to the same embodiment, nor are they separate or selective embodiments that are mutually exclusive with other embodiments. In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of this utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically limited.

[0040] In the description of this specification, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate, or the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] At the same time, in the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "top, bottom, inside and outside" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] Existing energy storage systems or power battery packs generally include multiple single cells (single cells can be existing single cylindrical batteries, square shell batteries, soft pack batteries, etc.) and battery management systems. Multiple single cells are connected in series, in parallel, or in series and in parallel to meet different capacity requirements. The battery management system is mainly used to maintain and manage each single cell to prevent overcharging and over-discharging. The above-mentioned multiple single cells are prone to thermal runaway during use or when overcharged, over-discharged, or mechanically collided, generating thermal runaway smoke. The thermal runaway smoke gathers outside the energy storage system or power battery pack, posing a safety hazard.

[0043] The utility model provides a thermal runaway flue gas treatment device, which ignites the thermal runaway flue gas generated by the thermal runaway of the battery to improve the safety of the energy storage system or the power battery pack. The thermal runaway flue gas treatment device has a plurality of flue gas channels on its outer shell, and the plurality of flue gas channels disperse the thermal runaway flue gas into the combustion zone, and the thermal runaway flue gas is dispersedly ignited in the combustion zone to form a plurality of dispersed combustion points. Compared with a centralized single combustion point, the combustion flame of each dispersed combustion point is relatively small, which can reduce the flame height of the thermal runaway flue gas during combustion, and control the height of the thermal runaway flue gas combustion flame within a certain range, thereby improving the safety of the entire thermal runaway flue gas treatment device during use.

[0044] like Figures 1 to 4 As shown, this embodiment provides a thermal runaway flue gas treatment device, which mainly includes an outer shell 1, a combustion shell 2 and an ignition assembly 3; the combustion shell 2 is arranged above the outer shell 1, and forms a combustion zone 21 with the top plate 11 of the outer shell 1; the outer shell 1 is provided with a plurality of flue gas channels 12 that penetrate in the longitudinal direction, and the plurality of flue gas channels 12 are all connected to the combustion zone 21, and are used to disperse and introduce the thermal runaway flue gas into the combustion zone 21; the ignition assembly 3 is used to ignite the thermal runaway flue gas in the combustion zone 21, and the thermal runaway flue gas is dispersedly ignited in the combustion zone 21 to form a plurality of dispersed combustion points. The structures of each component and device are described in detail below.

[0045] like Figure 3As shown, the outer shell 1 in this embodiment is a cylindrical structure with a top plate 11. The top plate 11 and the combustion shell 2 above the top plate 11 form a combustion zone 21. Multiple smoke channels 12 run through the longitudinal direction of the cylinder and are connected to the combustion zone 21 at the top of the outer shell 1. Multiple smoke channels 12 disperse the thermal runaway smoke from the outer shell 1 into the combustion zone 21 to form multiple dispersed combustion points. The thermal runaway smoke is processed through multiple dispersed combustion points, thereby reducing the flame height when the thermal runaway smoke burns. The above-mentioned smoke channels 12 can be mainly realized in the following ways:

[0046] First, the side wall of the outer shell 1 is provided with a plurality of ridges extending along the length direction thereof, and the smoke passage 12 is a through hole provided on the ridges and passing through longitudinally. During specific processing, since the smoke passage 12 is processed on the ridges, the thickness requirement of the side wall of the outer shell 1 is relatively low;

[0047] Second, a plurality of through holes are processed on the side wall of the outer shell 1 in the longitudinal direction to form a smoke channel 12; when processing the smoke channel 12 of this structure, the side wall of the outer shell 1 is required to have a certain thickness;

[0048] Among the above-mentioned various structural forms, the second structure which is relatively simple to manufacture and process is preferred. In specific processing, the number of smoke channels 12 is 4 to 10, preferably 5 to 6, and the multiple smoke channels 12 can be evenly distributed along the circumference of the outer shell 1, preferably arranged in a circular shape with the longitudinal axis of the outer shell 1 as the center. This arrangement allows multiple evenly dispersed combustion points to be formed when the thermal runaway smoke is ignited, and the combustion flame height of each dispersed combustion point is relatively uniform.

[0049] like Figure 3 and Figure 4 As shown, in order to further reduce the flame height when the thermal runaway smoke is burning, the thermal runaway smoke can be mixed with oxygen before ignition. At the same time, after mixing with oxygen, the thermal runaway smoke burns more fully. Specifically, the smoke channel 12 may include a first channel 121 and a mixing channel 122 that are connected in sequence from bottom to top. The mixing channel 122 is connected to the combustion zone 21. The mixing channel 122 is provided with an oxygen mixing port 123 that is connected to the external environment. The oxygen mixing port 123 transports external air into the mixing channel 122, mixes with the thermal runaway smoke input from the first channel 121, and then transports it to the combustion zone 21.

[0050] Preferably, the central axes of the first channel 121 and the mixing channel 122 are coaxial, the cross-sectional dimension of the first channel 121 is smaller than the cross-sectional dimension of the mixing channel 122, and the length of the first channel 121 is greater than the length of the mixing channel 122. This arrangement can not only increase the size of the oxygen mixing port 123 to ensure the oxygen mixing ratio of the thermal runaway flue gas, but also, since the first channel 121 and the mixing channel 122 are both capillary-like structures, the capillary can increase the flow velocity of the thermal runaway flue gas to ensure that the thermal runaway flue gas can be better mixed with oxygen. Better oxygen mixing can make the thermal runaway flue gas burn more fully, reduce the generation of yellow flames, and even achieve flameless combustion.

[0051] In actual processing, since the size of the mixing channel 122 is larger than that of the first channel 121, the preferred solution in this embodiment is: the first channel 121 is formed by a through hole arranged on the side wall of the outer shell 1; the mixing channel 122 is formed by a through hole arranged on the ridge of the outer shell 1. This structure can not only ensure the strength of the outer shell 1, but also arrange the mixing channel 122 on the ridge, and can also increase the number of oxygen mixing ports 123.

[0052] In this embodiment, the combustion shell 2 mainly forms a combustion zone 21 with the top plate 11 of the outer shell 1, providing a combustion space for the combustion of the thermal runaway flue gas. The combustion shell 2 can be a cylindrical structure with both ends open, or a rectangular shell structure with both ends open, etc., which is not required. In other embodiments, the side wall of the combustion shell 2 can be provided with a plurality of air holes (not shown in the figure), which can be circular holes, square holes, or strip holes, which is not required.

[0053] The combustion shell 2 can be an integral structure with the outer shell 1, or a split structure. In the case of an integral structure, the combustion shell 2 and the outer shell 1 can be formed by casting, 3D printing, etc.; in the case of a split structure, the combustion shell 2 can be installed on the top plate 11 of the outer shell 1 in a variety of ways. For example, a flange can be installed at the bottom open end of the combustion shell 2, and the combustion shell 2 can be fixed to the top plate 11 of the outer shell 1 by the flange and bolts; for example, an annular groove can be provided on the upper end surface of the top plate 11, and the side wall of the combustion shell 2 can be inserted into the annular groove, etc. In this embodiment, the preferred method is to set the combustion shell 2 and the outer shell 1 as an integral structure. The integral structure can prevent heat or flame from leaking out of the connection when the flue gas burns due to thermal runaway, and also omits the process of on-site assembly and disassembly.

[0054] like Figure 4As shown, in this embodiment, a partition 4 can also be provided in the combustion zone 21, and the partition 4 and the top plate 11 of the outer shell 1 form a smoke cavity 43. The smoke cavity 43 has a certain buffering effect on the thermal runaway smoke, so as to prevent the instantaneous pressure of the thermal runaway smoke from being too high and extinguishing the flame at the combustion point. At the same time, the partition 4 is provided with a plurality of smoke holes 41 connected to the smoke cavity 43. The number of the smoke holes 41 can be consistent with the number of the smoke channels 12, or can be slightly less than or slightly more than the smoke channels 12. The plurality of smoke holes 41 are evenly distributed on the partition 4, and the central axis of each smoke hole 41 is staggered with the central axis of the smoke channel 12. In addition, a fire-blocking net 42 covering the smoke holes 41 is provided on the partition 4, and the fire-blocking net 42 prevents the combustion flame from flowing back.

[0055] like Figure 4 As shown, in this embodiment, the ignition assembly 3 mainly includes a trigger 34 and an igniter; the igniter is used to ignite the thermal runaway flue gas in the combustion zone 21, and the trigger 34 is used to start the igniter when the thermal runaway flue gas passes through the outer shell 1; the above-mentioned igniter can be implemented in different structures, for example, an existing arc igniter or a resistance wire igniter can be used, and in this embodiment, an arc igniter can be used, and the arc igniter can be powered by a dry cell or an external circuit. The above-mentioned arc igniter specifically includes an ignition needle 31, a high-voltage package 32, and a circuit board 33. When installed, the ignition needle 31 is installed in the combustion shell 2, the high-voltage package 32 and the circuit board 33 are integrated together, and installed outside the combustion shell 2 to avoid damage to it by the combustion flame or heat of the thermal runaway flue gas.

[0056] The trigger 34 is mounted on the outer shell 1 and is used to start the igniter when the thermal runaway smoke passes through the outer shell 1. The trigger 34 can be a sensor. When the battery generates thermal runaway smoke due to thermal failure, the sensor monitors the flow, pressure, temperature and gas composition of the thermal runaway smoke in real time. When the monitored data exceeds the threshold, a signal is sent to the igniter to start ignition. The sensor in this embodiment can be an airflow sensor, such as an electronic cigarette microphone.

[0057] In this embodiment, since the smoke channel 12 is preferably arranged on the side wall of the outer shell 1, the high-voltage package 32, circuit board 33, trigger 34 and dry battery 35 of the above-mentioned igniter can be arranged in the inner cavity of the outer shell 1. This installation method can not only protect the high-voltage package 32, circuit board 33, dry battery 35 and trigger 34, and prevent them from being damaged during use or transportation when installed outside the outer shell 1, but also make full use of the internal space of the outer shell 1 to achieve integrated installation of various components and reduce the installation space of the entire device. During specific installation, the airflow sensor is arranged at the bottom of the inner cavity of the outer shell 1, which can directly meet the direct triggering of the thermal runaway smoke, and ensure that the igniter can be triggered in time and reliably after the battery thermal runaway smoke. The high-voltage package 32 and the circuit board 33 are installed at the top of the inner cavity of the outer shell 1. At this time, the ignition needle 31 passes through the partition 4 and the top plate 11 of the outer shell 1 and is connected to the high-voltage package 32.

[0058] like Figures 5 to 7 As shown, in this embodiment, in order to further ensure the safety during combustion, the outer side of the combustion shell 2 is also provided with a fireproof cover 5, and the fireproof cover 5 can be implemented by the following structure: the fireproof cover 5 is a cylindrical structure with an open bottom, and the side wall of the cylinder is provided with air holes 51. In order to maintain the aesthetics and the convenience of installation, the shape of the fireproof cover 5 is preferably consistent with the shape of the combustion shell 2. At the same time, there is a certain distance between the side wall of the fireproof cover 5 and the side wall of the combustion shell 2, that is, the size of the fireproof cover 5 needs to be much larger than the size of the combustion shell 2. At this time, the fireproof cover 5 can prevent the flame from spilling out and isolate the heat generated during combustion, thereby improving the safety of the device when in use. In other embodiments, multiple air holes 51 can be processed on the top of the fireproof cover 5. The multiple air holes 51 can prevent the combustion flame from being pressed down by the top of the combustion shell 2 when the instantaneous combustion flame is large, and the combustion flame is extinguished by the collision with the combustion flame below, thereby further ensuring the stability of the thermal runaway flue gas during combustion. In addition, the combustion shell 2 can also be set to a structure with open top and bottom. The structure with open top can also achieve the above functions. It should be noted that a fire-blocking net needs to be installed at the open end of the top of the combustion shell 2 to prevent the flame from spilling out.

[0059] When installing the above-mentioned fireproof cover 5, it can be directly installed on the outside of the combustion shell 2. At this time, an annular connecting boss is provided on the outside of the combustion shell 2, and the annular connecting boss has an external thread. The inner wall of the fireproof cover 5 has an internal thread, and the fireproof cover 5 is connected to the annular connecting boss through threads.

[0060] In this embodiment, the fireproof cover 5 is installed in the following manner:

[0061] The fireproof cover 5 is installed on the combustion shell 2 through an elastic component 6. The elastic component 6 includes a compression spring 61 and two bimetallic buckles 62. One end of the bimetallic buckle 62 is connected to the combustion shell 2, and the other end is connected to the fireproof cover 5. One end of the compression spring 61 is connected to the combustion shell 2, and the other end is connected to the fireproof cover 5. The bimetallic buckle 62 is disengaged from the combustion shell 2 after being deformed by heat, and the fireproof cover 5 pops up under the action of the compression spring 61. This structure utilizes the principle of thermal deformation of the bimetallic strip and uses the bimetallic strip as a buckle. When the thermal runaway flue gas is not ignited, the fireproof cover 5 is kept in a smaller space. When the thermal runaway flue gas is ignited, the bimetallic strip is disengaged after being deformed by heat. The fireproof cover 5 pops up under the action of the compression spring 61, increasing the height between the fireproof cover 5 and the combustion shell 2, thereby increasing the height of the combustion zone, avoiding flame spillage when the instantaneous flame is large, and improving the protectiveness of the device when the thermal runaway flue gas is burning.

[0062] In addition, if Figure 6 and Figure 7 As shown, in order to facilitate the installation and connection of the entire device, external threads can also be processed on the outer wall of the outer shell 1. The area with external threads is the external thread section 13. The external thread section 13 facilitates the connection of the entire device with the external smoke pipeline or the battery pack shell. During specific processing, the external thread section 13 needs to be above the inlet of the smoke channel 12, so that when the entire device is connected to the external smoke pipeline or the battery pack shell, the inlet of the smoke channel 12 and the trigger 34 need to be located inside the external smoke pipeline or inside the battery pack shell.

[0063] The above-mentioned battery thermal runaway flue gas treatment device can be applied to energy storage equipment. When it is installed and used, the flue gas pipeline is mounted on the outer shell 1 and is connected to the outer shell 1 by threads. The flue gas pipeline centrally draws out the thermal runaway flue gas generated by any battery in the energy storage device, and transports the thermal runaway flue gas to the above-mentioned thermal runaway flue gas treatment device for treatment.

[0064] The above-mentioned battery thermal runaway flue gas treatment device can be used in the power battery pack of electric vehicles. When it is installed and used, the flue gas pipeline is mounted on the outer shell 1 and connected to the outer shell 1 by threads. The flue gas pipeline centrally draws out the thermal runaway flue gas generated by any battery in the power battery pack and transports the thermal runaway flue gas to the thermal runaway flue gas treatment device for treatment. Alternatively, the outer shell is directly connected to the opening of the power battery pack shell. At this time, the inlet of the flue gas channel 12 and the trigger 34 are located in the inner cavity of the battery pack shell. When any single cell in the power battery pack is thermally runaway, the thermal runaway flue gas triggers the sensor and starts the igniter. The thermal runaway flue gas passes through multiple flue gas channels 12 to the combustion zone 21 and is dispersedly ignited and treated.

Claims

1. A thermal runaway flue gas treatment device, characterized in that: It includes an outer shell, an ignition assembly and a combustion shell; The combustion shell is arranged above the outer shell and forms a combustion zone with the top plate of the outer shell; The side wall of the outer shell is provided with a plurality of smoke passages which penetrate in the longitudinal direction, and the plurality of smoke passages are all connected with the combustion zone, and are used for dispersing and introducing the thermal runaway smoke into the combustion zone; The ignition assembly is used to ignite the thermal runaway flue gas dispersedly introduced into the combustion zone to form a plurality of dispersed combustion points.

2. The thermal runaway flue gas treatment device according to claim 1, characterized in that: The smoke passages are through holes arranged on the side wall of the outer shell and extending longitudinally through the outer shell. The number of the smoke passages is 4 to 10.

3. The thermal runaway flue gas treatment device according to claim 2, characterized in that: The flue gas channel comprises a mixing channel and a first channel which are connected in sequence from top to bottom. The mixing channel is connected to the combustion zone, and an oxygen mixing port connected to the external environment is provided on the mixing channel.

4. The thermal runaway flue gas treatment device according to claim 3, characterized in that: The cross-sectional dimension of the first channel is smaller than the cross-sectional dimension of the mixing channel, and the length of the first channel is greater than the length of the mixing channel.

5. The thermal runaway flue gas treatment device according to any one of claims 1 to 4, characterized in that: The ignition assembly includes a trigger and an igniter; the igniter includes an ignition needle, a high-voltage package and a circuit board, the ignition needle is arranged in the combustion area, and the trigger, the high-voltage package and the circuit board are arranged in the inner cavity of the shell body.

6. The thermal runaway flue gas treatment device according to claim 5, characterized in that: The trigger is an airflow sensor, and the airflow sensor is an electronic cigarette microphone, which is installed at the bottom of the inner cavity of the shell.

7. The thermal runaway flue gas treatment device according to any one of claims 1 to 4, characterized in that: A partition is arranged in the combustion zone, and the partition and the top plate of the outer shell form a smoke cavity. A plurality of smoke holes connected to the smoke cavity are arranged on the partition, and the central axis of the smoke hole is staggered with the central axis of the smoke channel. A fire-blocking net covering the smoke hole is arranged on the partition.

8. The thermal runaway flue gas treatment device according to claim 7, characterized in that: The combustion shell and the outer shell are an integrated structure.

9. The thermal runaway flue gas treatment device according to claim 8, characterized in that: The invention also comprises a fireproof cover which is sleeved on the outside of the combustion shell and has a plurality of air holes on the side wall and the top of the fireproof cover.

10. The thermal runaway flue gas treatment device according to claim 9, characterized in that: The fireproof cover is installed on the combustion shell through an elastic component, and the elastic component includes a compression spring and two bimetallic buckles. One end of the bimetallic buckle is connected to the combustion shell, and the other end is connected to the fireproof cover. One end of the compression spring is connected to the combustion shell, and the other end is connected to the fireproof cover. After the bimetallic buckle is deformed by heat, it disengages from the combustion shell, and the fireproof cover pops up under the action of the compression spring.

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