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 after thermal runaway flue gas generated by thermal runaway of an existing battery is exhausted. The thermal runaway flue gas treatment device comprises a combustion barrel, an ignition assembly, a supercharging device and an air conveying device, a combustion cavity for combusting thermal runaway flue gas is formed in the combustion barrel, and meanwhile, a plurality of first air holes communicated with the combustion cavity are formed in the combustion barrel; the ignition assembly is used for carrying out ignition treatment on thermal runaway flue gas in the combustion cavity; the pressurizing device is arranged in the combustion cylinder and used for pressurizing the thermal runaway flue gas entering the combustion cavity to form jet-flow-shaped gas, so that flames generated during combustion of the thermal runaway flue gas are thin and long columnar flames; and the air conveying device actively conveys external combustion-supporting gas into the combustion cavity, so that the thermal runaway flue gas is fully combusted.

Description

Technical Field

[0001] This utility model belongs to the field of battery safety, specifically relating to a thermal runaway flue gas treatment device. Background Technology

[0002] Lithium-ion batteries have a wide range of applications, including energy storage and power batteries. In recent years, with the further development of lithium-ion batteries, their safe use has also attracted attention. Due to the principles and structural characteristics of lithium-ion batteries, overcharging, over-discharging, overheating, and mechanical impacts can easily cause the battery separator to collapse and internal short circuits, leading to thermal runaway.

[0003] When lithium-ion batteries experience thermal runaway, they generate a large amount of thermal runaway fumes. These fumes are highly susceptible to combustion or explosion upon release, posing a safety hazard. Summary of the Invention

[0004] To address the safety hazards posed by the exhaust of thermal runaway fumes generated by existing battery thermal runaway, this invention provides a thermal runaway fumes treatment device.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A thermal runaway flue gas treatment device includes a combustion cylinder, an ignition assembly, a pressurization device, and a pneumatic conveying device. The combustion cylinder has a combustion chamber for burning thermal runaway flue gas, and the combustion cylinder is provided with multiple first air holes communicating with the combustion chamber. The ignition assembly is used to ignite the thermal runaway flue gas in the combustion chamber. The pressurization device is located in the combustion cylinder and is used to pressurize the thermal runaway flue gas entering the combustion chamber to form a jet-like gas, so that the flame during the combustion of the thermal runaway flue gas is a slender columnar flame. The pneumatic conveying device actively delivers combustion-supporting gas into the combustion chamber to ensure complete combustion of the thermal runaway flue gas.

[0007] Furthermore, the air delivery device includes a suction mechanism and an air delivery pipeline, the outlet of the air delivery pipeline is connected to the combustion chamber, and the suction mechanism is connected to the air delivery pipeline.

[0008] Furthermore, the air delivery pipeline is equipped with a flow regulating device.

[0009] Furthermore, a transfer pipe is fixed on the bottom plate of the combustion cylinder, and the outlet of the air delivery pipe is connected to the fixed transfer pipe.

[0010] Furthermore, the pressurization device is a venturi tube, which includes a constriction section, a throat, and a diffuser section arranged in sequence, with the constriction section installed on the bottom plate of the combustion chamber.

[0011] Furthermore, the first vent is located on the bottom plate of the combustion cylinder.

[0012] Furthermore, the top open end of the combustion cylinder is provided with a porous structure, which diverts the combustion flame overflowing from the top of the combustion chamber.

[0013] Furthermore, it also includes a triggering device for activating the ignition assembly and the air supply device when thermal runaway flue gas enters the combustion chamber.

[0014] Furthermore, it also includes a backfire prevention device, which is located at the bottom of the combustion cylinder to prevent the combustion flame from flowing back.

[0015] Furthermore, the ignition assembly includes a pulse ignition needle and a pulse generator, wherein the pulse ignition needle is disposed inside the combustion chamber and the pulse generator is disposed outside the combustion cylinder.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. This utility model's thermal runaway gas treatment device provides controllable ignition of the thermal runaway gas emitted after battery thermal runaway, avoiding safety hazards caused by the emission of thermal runaway gas. Before the thermal runaway gas is ignited, the device uses a pressurization device to pressurize and accelerate the thermal runaway gas, causing it to be ejected at high speed to form a jet-like gas. After the jet-like thermal runaway gas is ignited, the combustion flame inside the combustion chamber is a thin, columnar flame, preventing flame overflow and improving safety during combustion, thereby enhancing the safety of the thermal runaway gas treatment device during use. Simultaneously, before the thermal runaway gas is ignited, the device uses a pneumatic conveying device to actively deliver combustion-supporting gas into the combustion chamber, maximizing the participation of combustion-supporting gas in the combustion of the thermal runaway gas, ensuring complete combustion, and also resulting in a smaller flame, further improving the safety of the thermal runaway gas treatment device during use.

[0018] 2. In this utility model's thermal runaway flue gas treatment device, the pneumatic conveying device includes a suction mechanism and a pneumatic conveying pipeline. This configuration is easy to install and can be achieved using existing components, resulting in low cost. Furthermore, the pneumatic conveying pipeline is connected to the combustion chamber via a connecting pipe fixed to the bottom plate of the combustion cylinder, facilitating the installation and sealing of the pneumatic conveying pipeline.

[0019] 3. In the thermal runaway flue gas treatment device of this utility model, a flow regulating device is also provided on the air delivery pipeline. The flow regulating device adjusts the flow rate of the combustion-supporting gas in the air delivery pipeline so that the ratio of the combustion-supporting gas and the thermal runaway flue gas reaches the optimal combustion ratio, so that the thermal runaway flue gas can be further fully and completely combusted.

[0020] 4. In the thermal runaway flue gas treatment device of this utility model, the pressurization device adopts a Venturi tube, which has a simple structure and is easy to install.

[0021] 5. In the thermal runaway flue gas treatment device of this utility model, the first vent is located on the bottom plate of the combustion cylinder to enable the thermal runaway flue gas to achieve safe combustion in the combustion cylinder, and the combustion flame will not overflow, further improving the safety of the entire thermal runaway flue gas treatment device during use.

[0022] 6. In the thermal runaway flue gas treatment device of this utility model, the top open end of the combustion cylinder is provided with a porous structure. The porous structure diverts the combustion flame overflowing from the combustion chamber, making the flame overflowing from the combustion cylinder relatively gentle, further improving the safety of the entire thermal runaway flue gas treatment device during use.

[0023] 7. In the thermal runaway flue gas treatment device of this utility model, a triggering device is also provided at the bottom of the combustion cylinder. The triggering device will promptly and reliably start the ignition component and the air delivery device when the thermal runaway flue gas enters the combustion cylinder, so as to improve the reliability of thermal runaway flue gas treatment.

[0024] 8. In the thermal runaway flue gas treatment device of this utility model, a backfire prevention device is also provided between the combustion cylinder and the triggering device. The backfire prevention device can effectively prevent flame backflow, protect the triggering device, avoid damage to the triggering device by the flame, and ensure the accurate and reliable opening of the ignition component.

[0025] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the thermal runaway flue gas treatment device in the embodiment. Figure 1 ;

[0028] Figure 2 This is a schematic diagram of the thermal runaway flue gas treatment device in the embodiment. Figure 2 ;

[0029] Figure 3 This is a cross-sectional view of the thermal runaway flue gas treatment device in the embodiment;

[0030] Figure 4 This is an exploded view of the thermal runaway flue gas treatment device in the embodiment;

[0031] Figure 5 This is a schematic diagram of the pressurization device and the transfer pipe in the embodiment;

[0032] Figure 6 This is a schematic diagram of the installation of the airflow sensor in the embodiment.

[0033] Reference numerals: 1-combustion cylinder, 2-pressurization device, 3-ignition assembly, 4-air delivery device, 5-triggering device, 6-porous structure, 7-anti-backfire device, 11-combustion chamber, 12-first vent, 13-outer cylinder, 14-bottom plate, 15-transfer pipe, 141-first connecting pipe, 142-second connecting pipe, 31-pulse ignition needle, 32-pulse generator, 41-air delivery pipeline, 42-suction mechanism, 51-airflow sensor, 61-pin. Detailed Implementation

[0034] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0035] The phrase "other embodiments" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments. In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0036] In this specification, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection, an indirect connection via an intermediate component, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] Furthermore, in the description of this utility model, it should be noted that the terms "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0038] Existing energy storage devices or power battery packs generally consist of multiple individual cells (which can be existing cylindrical cells, prismatic cells, pouch cells, etc.). These individual cells are connected in series, parallel, or series-parallel to meet different capacity requirements. During use, or in the event of overcharging, over-discharging, or mechanical impact, these multiple individual cells are prone to thermal runaway, generating thermal runaway fumes. These fumes accumulate outside the energy storage device or power battery pack, posing a safety hazard.

[0039] This utility model provides a thermal runaway flue gas treatment device, which performs controllable ignition treatment on the thermal runaway flue gas discharged from energy storage devices or power battery packs, so that the thermal runaway flue gas will not cause safety hazards after being discharged, thereby improving the safety of energy storage devices or power battery packs.

[0040] Before the thermal runaway flue gas is ignited, the aforementioned thermal runaway flue gas treatment device uses a pressurization device to pressurize the flue gas. The increased pressure and velocity of the flue gas cause it to be ejected at high speed, forming a jet-like gas stream. Once ignited, the jet-like flue gas produces a slender, columnar flame within the combustion chamber. This slender, columnar flame reduces the likelihood of flame spread, increasing safety during combustion and thus enhancing the safety of the treatment device. Simultaneously, before ignition, the device uses a pneumatic conveying device to actively and continuously deliver combustion-supporting gas into the combustion chamber. This ensures sufficient combustion-supporting gas participates in the combustion of the flue gas, guaranteeing complete combustion while also resulting in a smaller flame, further improving the safety of the treatment device.

[0041] The following is a detailed description of the specific structure of the thermal runaway flue gas treatment device.

[0042] like Figures 1 to 4As shown, the thermal runaway flue gas treatment device provided in this embodiment includes a combustion cylinder 1, an ignition assembly 3, a pressurization device 2, and a pneumatic conveying device 4. The combustion cylinder 1 has a combustion chamber 11 for burning thermal runaway flue gas, and the combustion cylinder 1 is provided with multiple first air holes 12 communicating with the combustion chamber 11. The ignition assembly 3 is used to ignite the thermal runaway flue gas in the combustion chamber 11. The pressurization device 2 is located inside the combustion cylinder 1 and is used to pressurize the thermal runaway flue gas entering the combustion chamber 11, forming a jet-like gas so that the flame during combustion of the thermal runaway flue gas is a thin, columnar flame. The pneumatic conveying device 4 actively delivers combustion-supporting gas into the combustion chamber to ensure complete combustion of the thermal runaway flue gas. In this embodiment, the combustion-supporting gas is air; however, it should be noted that the combustion-supporting gas can also be oxygen or other gases that can support combustion.

[0043] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the inner cavity of the combustion cylinder 1 is a combustion chamber 11 for the combustion of thermal runaway flue gas, mainly providing combustion space for the combustion of thermal runaway flue gas. The combustion cylinder 1 mainly consists of an outer cylinder 13 and a bottom plate 14 located at the bottom of the outer cylinder 13. The outer cylinder 13 can specifically be a cylindrical structure with open top and bottom, or a rectangular shell structure with open top and bottom, etc., whichever is more specific. Figure 5 As shown, the base plate 14 includes a first connecting pipe 141 and a second connecting pipe 142 with different outer diameters. The first connecting pipe 141 and the second connecting pipe 142 are coaxial and fixedly connected. The outer diameter of the first connecting pipe 141 is slightly smaller than the inner diameter of the outer cylinder 13. After the first connecting pipe 141 is embedded into the inner cavity of the outer cylinder 13, the side wall of the outer cylinder 13 is fixedly connected to the first connecting pipe 141 by screws. The second connecting pipe 142 is used to connect to the device below the combustion cylinder 1.

[0044] like Figure 2 As shown, the combustion cylinder 1 is provided with a plurality of first air holes 12 communicating with the combustion chamber 11. The first air holes 12 can be circular holes, directional holes, or strip-shaped holes, and there are no requirements in this regard. The functions of the first air holes 12 are twofold: first, to discharge the gases after combustion; and second, to provide some of the air during combustion.

[0045] The first vent 12 can be located on the bottom plate 14 of the combustion chamber 1 or on the side wall of the combustion chamber 1. Preferably, the first vent 12 is located on the bottom plate 14 of the combustion chamber 1. This arrangement ensures safe combustion of the thermal runaway flue gas within the combustion chamber 1, preventing the combustion flame from overflowing and further enhancing the safety of the thermal runaway flue gas treatment device. Simultaneously, placing the first vent 12 on the bottom plate 14 of the combustion chamber 1 also facilitates the pressurization device 2 in drawing more air through the first vent 12 into the combustion chamber 11 to participate in the combustion of the thermal runaway flue gas, resulting in more complete combustion.

[0046] like Figure 3 and Figure 4 As shown, the pressurization device 2 in this embodiment is located inside the combustion chamber 1 and is used to pressurize the thermal runaway flue gas entering the combustion chamber 11 to form a jet-like gas, so that the flame during the combustion of the thermal runaway flue gas is a slender columnar flame. Specifically, the pressurization device 2 is located at the bottom of the combustion chamber 11 and is installed on the bottom plate 14 of the combustion chamber 1. Simultaneously, after the pressurization device 2 pressurizes the thermal runaway flue gas, the flow rate of the thermal runaway flue gas increases. The pressure difference generated by the flow rate draws more air into the combustion chamber 11 through the first air hole 12 to participate in the combustion of the thermal runaway flue gas, making the combustion of the thermal runaway flue gas more complete and further improving the safety of the thermal runaway flue gas treatment device during use.

[0047] In this embodiment, the pressurization device 2 is a Venturi tube, which includes a converging section, a throat, and a diffuser section arranged sequentially. The thermal runaway flue gas enters the combustion chamber 11 after passing through the converging section, throat, and diffuser section in sequence. Specifically, during installation, the converging section is fixed to the bottom plate 14 of the combustion chamber 1. The Venturi tube pressurizes and accelerates the thermal runaway flue gas entering the combustion chamber 1, making it a jet-like gas. After ignition, this jet-like gas produces a slender, columnar flame that does not overflow the sidewall of the combustion chamber 1, improving the safety of the thermal runaway flue gas combustion. Simultaneously, by increasing the flow rate of the thermal runaway flue gas, the Venturi tube utilizes the pressure difference generated by the flow rate to ensure that more air (oxygen) can stably and continuously enter the combustion chamber 11 through the first vent 12, allowing more air to participate in the combustion of the thermal runaway flue gas, resulting in more complete combustion. In other embodiments, a gas booster pump or similar device can also be used to pressurize and accelerate the thermal runaway flue gas.

[0048] In this embodiment, the air delivery device 4 actively and continuously delivers external combustion-supporting gas into the combustion chamber 11 so that sufficient combustion-supporting gas can participate in the combustion of thermal runaway flue gas. This method not only ensures that the thermal runaway flue gas can be fully combusted, but also makes the flame generated by combustion very small, further improving the safety of the thermal runaway flue gas treatment device.

[0049] like Figure 2and Figure 3 As shown, the air delivery device 4 in this embodiment includes a suction mechanism 42 and an air delivery pipeline 41. The suction mechanism 42 is mainly used to actively draw in external air and deliver it to the combustion chamber 11 through the air delivery pipeline 41. The suction mechanism 42 mainly uses equipment such as a blower, vacuum pump, etc. The inlet of the suction mechanism 42 is connected to the external environment, and the outlet is connected to the inlet of the air delivery pipeline 41. The outlet of the air delivery pipeline 41 is connected to the inner cavity of the combustion chamber 11. When thermal runaway of the battery generates thermal runaway smoke, the suction mechanism 42 continuously delivers external air to the combustion chamber 11 through the air delivery pipeline 41 so that a large amount of air participates in the combustion of the thermal runaway smoke, ensuring that the thermal runaway smoke in the combustion chamber is completely and fully combusted.

[0050] During the specific installation of the air supply pipeline 41, an air inlet is provided on the bottom plate 14 of the combustion chamber 1, and an adapter pipe 15 is fixed on the air inlet. The outlet of the air supply pipeline 41 is connected to the adapter pipe 15. The air supply pipeline 41 is connected to the combustion chamber through the adapter pipe 15, which facilitates the installation and sealing connection of the air supply pipeline 41, and also facilitates the manufacturing and processing of the combustion chamber 1.

[0051] The aforementioned suction mechanism 42 is activated when the battery experiences thermal runaway and generates thermal runaway smoke. Specifically, the activation of the suction mechanism 42 can be controlled by the battery management system (BMS). The battery management system (BMS) monitors the battery voltage, current, and temperature in real time. When any battery experiences thermal runaway and the voltage, current, and temperature exceed the threshold, the suction mechanism 42 starts working and actively draws air into the combustion chamber 11 to participate in combustion.

[0052] To ensure the reliable operation of the suction mechanism 42, the suction mechanism 42 may also be equipped with a relay, which controls the working state of the suction mechanism 42 so that the suction mechanism 42 can deliver air to the combustion chamber 11 in a timely manner to participate in the full combustion of thermal runaway flue gas.

[0053] The aforementioned air delivery duct 41 may also be equipped with a flow regulating device to adjust the air flow rate in the air delivery duct 41, so that the ratio of oxygen in the air to combustible gas in the thermal runaway flue gas reaches the optimal combustion ratio, allowing the thermal runaway flue gas to be further fully combusted. Specifically, the flow regulating device can be an existing flow control valve or similar device, which can be directly connected in series with the air delivery duct 41.

[0054] like Figure 4As shown, the ignition assembly 3 in this embodiment is mainly used to ignite the thermal runaway flue gas in the combustion chamber 11, achieving controllable combustion of the thermal runaway flue gas. The ignition assembly 3 can be implemented using different structures; for example, it can use existing arc igniters or resistance wire igniters. Specifically, the arc igniter can be a pulse igniter. This arc igniter can be powered by a dry cell battery or by an external circuit. In this embodiment, the ignition assembly 3 preferably uses a reliable pulse igniter. The aforementioned arc igniter specifically includes a pulse ignition needle 31 and a pulse generator 32. The pulse generator 32 includes a high-voltage transformer and a circuit board. During installation, the pulse ignition needle 31 passes through the through hole on the bottom plate 14 of the combustion chamber 1, with its ignition head located inside the combustion chamber 1. The pulse generator 32 is installed outside the combustion chamber 11 and can be fixed to the bottom of the combustion chamber 1 to prevent damage from the combustion flame or heat of the thermal runaway flue gas.

[0055] The ignition component 3 mentioned above can be activated through the BMS (Battery Management System). When activated by the BMS, the BMS monitors the battery voltage, current and temperature in real time. When any battery experiences thermal runaway and the voltage, current and temperature exceed the threshold, the pulse igniter is activated and the ignition needle ignites.

[0056] like Figure 1 and Figure 2 As shown, to ensure timely ignition of the thermal runaway flue gas, this embodiment activates the ignition assembly 3 and / or the air supply device 4 via a triggering device 5. The triggering device 5 is installed along the path of the thermal runaway flue gas, reliably activating the ignition assembly 3 and / or the air supply device 4 when the thermal runaway flue gas enters the combustion chamber 1. The triggering device 5 can be a sensor of various types, such as a pressure sensor, a gas sensor, a flow sensor 51, or a temperature sensor. When the battery experiences thermal runaway, the sensor monitors the flow rate, pressure, temperature, and gas composition of the flue gas in real time. When the monitored data exceeds a threshold, a signal is sent to the pulse generator 32, thereby initiating ignition.

[0057] like Figure 6 As shown, the sensor in this embodiment can specifically be an airflow sensor 51 or a flow switch. The airflow sensor 51 can specifically be an electronic cigarette microphone, etc., to ensure that the igniter can be triggered in a timely and reliable manner after the battery thermal runaway smoke. In specific installation, the airflow sensor 51 is set at the bottom of the combustion cylinder 1, so that it can directly receive the direct triggering of the thermal runaway smoke, ensuring that the igniter can be triggered in a timely and reliable manner after the battery thermal runaway smoke.

[0058] like Figure 2As shown, after the ignition assembly 3 ignites the thermal runaway flue gas, to prevent backflow of the combustion flame and its impact on the triggering device 5 and other components, this embodiment also includes a backfire prevention device 7 at the bottom of the combustion chamber 1. The backfire prevention device 7 is specifically installed between the combustion chamber 1 and the triggering device 5. If a flame spreads backward after the thermal runaway flue gas is ignited, the flame is blocked by the backfire prevention device 7, thus preventing damage to the triggering device 5. This backfire prevention device 7 effectively protects the triggering device 5, ensuring that it can be accurately and reliably activated, thereby ensuring reliable ignition of the ignition assembly 3.

[0059] The aforementioned backfire prevention device 7 can be any type of device, as long as it can prevent the combustion flame from flowing back. Specifically, it can be a backfire prevention valve or a pipeline flame arrester, which is connected to the bottom of the combustion cylinder 1 via threads or flanges. In this embodiment, the backfire prevention device 7 is a backfire prevention valve, which has a simple structure and is easy to install.

[0060] like Figure 3 and Figure 4 As shown, in order to further improve the safety of thermal runaway flue gas combustion, the top open end of the combustion cylinder 1 is also provided with a porous structure 6. If the combustion flame overflows at the top of the combustion cylinder 1, the porous structure 6 can disperse and divert the overflowing combustion flame, making the overflowing flame relatively gentle, and further improving the safety of the entire thermal runaway flue gas treatment device during use.

[0061] In this embodiment, the porous structure 6 is a honeycomb ceramic column, and the cross-sectional shape of the honeycomb ceramic column matches the cross-sectional shape of the combustion chamber 11. When installing the honeycomb ceramic column, an annular boss can be added to the inner wall of the combustion cylinder 1, the porous structure 6 can be placed on the annular boss, and then it can be fixed. Alternatively, as... Figure 3 and Figure 4 As shown, two pins 61 are provided on the side wall of the combustion cylinder 1, and the porous structure 6 is placed between the two pins 61. The two pins 61 limit and fix the porous structure 6.

[0062] In other embodiments, the porous structure 6 described above can be a porous dielectric plate or several layers of high-temperature resistant metal mesh, etc.

[0063] The operation process of the thermal runaway flue gas treatment device in this embodiment is as follows:

[0064] When thermal runaway of the battery generates thermal runaway flue gas, the flue gas enters the thermal runaway flue gas treatment device through an external flue gas pipeline. When the thermal runaway flue gas passes through the triggering device 5, the triggering device 5 activates the ignition assembly 3 and the air delivery device 4. The ignition assembly 3 starts to ignite, and the air delivery device 4 continuously delivers external air into the combustion chamber 11. At the same time, the thermal runaway flue gas entering the combustion chamber 11 is pressurized by the pressurizing device 2 to form a jet-shaped gas. The jet-shaped gas is ignited to form a slender columnar flame. The slender columnar flame burns safely in the combustion chamber 11. If the combustion flame overflows from the top of the combustion cylinder 1, the porous structure 6 disperses and diverts the overflowing combustion flame to achieve safe combustion of the thermal runaway flue gas.

[0065] The thermal runaway flue gas treatment devices in Embodiments 1 and 2 above can be applied to energy storage devices. Thermal runaway flue gas generated by thermal runaway of any battery in the energy storage device is centrally led out through a flue gas pipeline. This flue gas pipeline is connected to the thermal runaway flue gas treatment device, which performs controllable and safe ignition treatment on the thermal runaway flue gas.

[0066] The thermal runaway flue gas treatment devices described in Embodiments 1 and 2 above can be applied to electric vehicle power battery packs. In specific installation and use, a flue gas pipeline centrally draws out the thermal runaway flue gas generated by any battery in the power battery pack. The flue gas pipeline is connected to the thermal runaway flue gas treatment device, which performs controllable and safe ignition treatment on the thermal runaway flue gas. Alternatively, the thermal runaway flue gas treatment device can be directly connected to the power battery pack casing. When any single battery cell in the power battery pack experiences thermal runaway, the thermal runaway flue gas treatment device performs controllable and safe ignition treatment on the thermal runaway flue gas emitted from the battery pack.

Claims

1. A thermal runaway flue gas treatment device, characterized in that, It includes a combustion chamber, ignition assembly, pressurization device, and pneumatic conveying device; The combustion cylinder has a combustion chamber for thermal runaway flue gas combustion, and the combustion cylinder is provided with multiple first air holes that communicate with the combustion chamber. The ignition assembly is used to ignite the thermal runaway flue gas in the combustion chamber. The pressurization device is located inside the combustion cylinder and is used to pressurize the thermal runaway flue gas entering the combustion chamber to form a jet-shaped gas so that the flame during the combustion of the thermal runaway flue gas is a slender columnar flame. The air delivery device actively transports the combustion-supporting gas into the combustion chamber to ensure that the thermal runaway flue gas is fully combusted.

2. The thermal runaway flue gas treatment device according to claim 1, characterized in that, The air delivery device includes a suction mechanism and an air delivery pipeline. The outlet of the air delivery pipeline is connected to the combustion chamber, and the suction mechanism is connected to the air delivery pipeline.

3. The thermal runaway flue gas treatment device according to claim 2, characterized in that, The air delivery pipeline is equipped with a flow regulating device.

4. The thermal runaway flue gas treatment device according to claim 3, characterized in that, A transfer pipe is fixed on the bottom plate of the combustion cylinder, and the outlet of the air delivery pipe is connected to the transfer pipe.

5. The thermal runaway flue gas treatment device according to claim 1, characterized in that, The pressurization device is a venturi tube, which includes a constriction section, a throat, and a diffuser section arranged in sequence. The constriction section is installed on the bottom plate of the combustion cylinder.

6. The thermal runaway flue gas treatment apparatus according to any one of claims 1 to 5, characterized in that, The first vent is located on the bottom plate of the combustion cylinder.

7. The thermal runaway flue gas treatment device according to claim 6, characterized in that, The top open end of the combustion cylinder is provided with a porous structure, which diverts the combustion flame that overflows from the top of the combustion chamber.

8. The thermal runaway flue gas treatment device according to claim 7, characterized in that, It also includes a triggering device, which is used to activate the ignition assembly and the air supply device when thermal runaway flue gas enters the combustion chamber.

9. The thermal runaway flue gas treatment device according to claim 8, characterized in that, It also includes a backfire prevention device, which is located at the bottom of the combustion cylinder to prevent the combustion flame from flowing back.

10. The thermal runaway flue gas treatment device according to claim 9, characterized in that, The ignition assembly includes a pulse ignition needle and a pulse generator. The pulse ignition needle is located inside the combustion chamber, and the pulse generator is located outside the combustion cylinder.

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