Thermal runaway flue gas treatment device

Abstract

The utility model provides a thermal runaway flue gas treatment device which is used for effectively treating thermal runaway flue gas so as to solve the problem of potential safety hazards caused by the fact that the thermal runaway flue gas is discharged out of a battery shell. The thermal runaway flue gas treatment device comprises at least one treatment tank body, and a flue gas inlet and a flue gas outlet are formed in the treatment tank body; the treatment tank body is filled with 0.05-0.5 mol / L of aqueous alkali and is used for treating thermal runaway flue gas generated by thermal runaway of the battery. The alkaline solution with the concentration not only can fully treat electrolyte carried in the thermal runaway flue gas, but also can treat part of gas in the thermal runaway flue gas, the gas amount of the thermal runaway flue gas treated by the alkaline solution with the concentration is greatly reduced, and the thermal runaway flue gas treatment efficiency is improved. Therefore, the problem of potential safety hazards caused by the fact that thermal runaway smoke is discharged out of the battery shell is solved.

Description

[0001] This application is a divisional application of the patent application with the application number 202323598321X, the application date of December 28, 2023, and the invention name of "a thermal runaway flue gas treatment device". TECHNICAL FIELD

[0002] The utility model belongs to the field of battery safety, specifically relates to a thermal runaway flue gas treatment device. BACKGROUND

[0003] With the development of new energy such as solar energy and wind energy, energy storage technology has also developed, and since lithium batteries have the advantages of high energy, long service life, high rated voltage, high power bearing capacity, and low self-discharge rate, they have gradually become the mainstream product of energy storage.

[0004] With the application of lithium battery energy storage system, the safe use of lithium ion battery has also been concerned. Due to the high concentration of battery packs in the energy storage system, under the influence of factors such as overcharge, overdischarge, overheating and mechanical impact, the battery separator collapses and internal short circuit, which leads to thermal runaway, which may eventually cause the battery to ignite, and in severe cases, it may cause an explosion, causing safety hazards.

[0005] When the lithium battery is completely thermal runaway, the internal temperature of the battery is as high as 500-1000℃, and the gas generated during the thermal runaway process causes the internal pressure of the battery to increase, causing the battery shell to expand and rupture, and finally the explosion relief valve opens, spraying and releasing the electrolyte and reaction gas vaporized inside the battery.

[0006] The above-mentioned vaporized electrolyte and reaction gas are discharged from the battery shell, which is easy to gather and cause safety hazards such as combustion, and at the same time, the above-mentioned reaction gas contains toxic gases such as HF, which also pollutes the environment to a certain extent. INVENTION CONTENTS

[0007] The utility model provides a kind of thermal runaway flue gas treatment device, for effectively treating thermal runaway flue gas, to solve the safety hazard problem that thermal runaway flue gas discharges from battery shell exists.

[0008] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0009] The utility model provides a kind of thermal runaway flue gas treatment device, and the thermal runaway flue gas treatment device includes at least one processing tank body, and the processing tank body is provided with flue gas inlet and flue gas outlet;The processing tank body is filled with 0.05-0.5mol / L alkali solution, for treating the thermal runaway flue gas generated by battery thermal runaway.

[0010] Further, the alkali solution in the processing tank body is 0.1-0.2mol / L NaOH solution.

[0011] Further, the alkali solution in the processing tank body is 0.1 mol / L NaOH solution.

[0012] Further, the processing tank body is provided with a dispersing assembly for dispersing and shunting the thermal runaway flue gas entering the processing tank body.

[0013] Further, the processing tank body is provided with a first one-way valve at the flue gas inlet and a second one-way valve at the flue gas outlet.

[0014] Further, the processing tank body is provided with a perforated plate at the top of the cavity.

[0015] Further, the processing tank body comprises a cylinder with an open top and an end cover sealingly arranged at the open end; the flue gas inlet is arranged on the bottom plate of the cylinder, and the flue gas outlet is arranged on the end cover.

[0016] Compared with the prior art, the technical scheme of the utility model has the following advantages:

[0017] 1. The thermal runaway flue gas treatment device provided by the utility model is filled with 0.05-0.5 mol / L alkali solution in the processing tank body, the alkali solution with the concentration can not only fully treat the electrolyte carried in the thermal runaway flue gas to prevent the vaporized electrolyte from continuing to decompose, but also treat part of the gas in the thermal runaway flue gas, so that the gas amount of the thermal runaway flue gas treated by the alkali solution with the concentration is greatly reduced, thereby solving the safety hidden trouble problem of the thermal runaway flue gas discharged out of the battery shell.

[0018] 2. In the thermal runaway flue gas treatment device, the processing tank body is provided with a dispersing assembly for dispersing and shunting the thermal runaway flue gas entering the processing tank body, so that the thermal runaway flue gas is fully contacted and reacted with the alkali solution, and the treatment effect of the alkali solution is further improved.

[0019] 3. In the thermal runaway flue gas treatment device, the processing tank body is provided with a first one-way valve at the flue gas inlet, which avoids backflow of the alkali solution in the processing tank body. Meanwhile, a second one-way valve is arranged at the flue gas outlet, which is used for preventing volatilization of the alkali solution and affecting the treatment effect of the alkali solution.

[0020] 4. In the thermal runaway flue gas treatment device, the processing tank body is provided with a perforated plate at the top of the cavity, and the perforated plate is used for placing adsorption medium, when the thermal runaway flue gas passes through the alkali solution, part of the alkali solution is carried, and the adsorption medium on the perforated plate can adsorb the alkali solution, so that the gas discharged from the processing tank body has good safety.

[0021] 5. The heat runaway flue gas treatment device, heat runaway flue gas is treated after effect is remarkable after the alkali solution of concentration 0.1~0.2 mol / L, and the effect is best after the alkali solution of concentration 0.1 mol / L.

[0022] Other advantages, objects and features of the present application will be apparent from the following description, and will be understood by those skilled in the art. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 Structure diagram of heat runaway flue gas treatment device in embodiment 3 Figure 1

[0025] Figure 2 Structure diagram of heat runaway flue gas treatment device in embodiment 3 Figure 2

[0026] Figure 3 Structure diagram of heat runaway flue gas treatment device in embodiment 4.

[0027] The drawings show that: 1 is the treatment tank body, 2 is the adsorption pipeline, 11 is the cylinder, 12 is the end cover, 13 is the flue gas inlet, 14 is the flue gas outlet, 15 is the scattering assembly, 16 is the first one-way valve, 17 is the second one-way valve, 18 is the perforated plate. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0029] ​​The "other embodiments" appearing in various places in the description are not all referring to the same embodiment, nor are they mutually exclusive embodiments that are individually or alternatively selected from other embodiments. In the description of the present application, the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0030] In the description of the present application, unless otherwise specifically defined and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate part, or internal communication of two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0031] Meanwhile, in the description of the present application, it should be pointed out that the positions or positional relationships indicated by the terms "top, bottom, inside and outside" in the description are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application.

[0032] The existing energy storage device generally includes an energy storage cabinet and a plurality of battery modules arranged in the energy storage cabinet. The battery modules can be composed of existing single cylindrical batteries or square cell batteries in series and parallel, or large-capacity batteries composed of existing single batteries. The above-mentioned battery modules are prone to thermal runaway during use or when overcharged, overdischarged and mechanically collided.

[0033] Studies have shown that when lithium ion batteries are in thermal runaway, a series of chemical reactions will occur inside, releasing a large amount of heat and gas, such as: SEI film decomposition reaction (90-120℃), negative electrode and electrolyte reaction (100-350℃), electrolyte decomposition reaction (110-300℃), separator shrinkage and melting reaction (>130℃), positive electrode and electrolyte reaction (200-300℃) and binder decomposition reaction (200-300℃) and so on. The above reactions do not occur in a fixed order, nor do they occur independently.

[0034] When the battery temperature is about 90-120℃, firstly, the SEI film decomposes, releasing heat, and generating gases such as C2H4, CO2 and O2. As the temperature continues to rise, when the battery temperature is about 120℃, the negative electrode surface has lost the protection of the SEI film, and the embedded lithium reacts with the organic solvent of the electrolyte, such as ethylene carbonate (EC), propylene carbonate (PC), diethyl carbonate (DEC), dimethyl carbonate (DMC) and methyl ethyl carbonate (EMC), to produce CxHy gas. When the temperature is 110-300℃, the electrolyte and the electrolyte itself will also undergo a series of decomposition reactions to produce some fluorides. As the temperature continues to rise, the positive electrode material begins to decompose and produce O2. The O2 produced by the decomposition of the positive electrode material reacts with the solvent of the electrolyte: when the O2 concentration is high, the reaction generates CO2, and when the O2 concentration is low, the reaction generates CO. When the battery temperature exceeds 235℃, the binder polyvinylidene fluoride (PVDF) will react with lithium and undergo self-decomposition.

[0035] From the above process, it can be seen that when the battery is in thermal runaway, the thermal runaway flue gas discharged mainly includes the following components: vaporized electrolyte, CO2, CO, H2, CH4, CxHy, O2, F2, POF3 and HF, etc. The thermal runaway flue gas not only contains hydrogen, CO, CO2, methane and other gases, but also contains a large amount of electrolyte vapor. The vaporized electrolyte not only reacts with the positive electrode sheet or negative electrode sheet in the battery cavity, but also undergoes a series of decomposition reactions, thereby continuing to produce a large amount of harmful gas. x H y 、C x H y O z 、C x H y F、POF3 and HF, etc. The thermal runaway flue gas not only contains hydrogen, CO, CO2, methane and other gases, but also contains a large amount of electrolyte vapor. The vaporized electrolyte not only reacts with the positive electrode sheet or negative electrode sheet in the battery cavity, but also undergoes a series of decomposition reactions, thereby continuing to produce a large amount of harmful gas.

[0036] The utility model provides a kind of thermal runaway flue gas processing method, this processing method mainly makes thermal runaway flue gas pass through certain concentration alkali solution, alkali solution is handled to vaporized electrolyte and part of gas in thermal runaway flue gas, not only hydrolysis treatment to electrolyte, prevent vaporized electrolyte continue decomposition reaction, while, part of gas is handled, the gas amount of thermal runaway flue gas after being handled by this concentration alkali solution is greatly reduced, thereby solve the security hidden danger problem that exists when thermal runaway flue gas is discharged outside battery shell.

[0037] Example 1

[0038] The thermal runaway flue gas when the lithium ion battery is in thermal runaway mainly includes vaporized electrolyte and CO2, CO, H2, CH4, CxHy, O2, F2, POF3 and HF, etc. x H y 、C x H y O z 、C x Hy F, POF3 and HF, etc. The alkali solution in the embodiment can cool the thermal runaway smoke, fully dissolve the electrolyte vapor in the thermal runaway smoke in the alkali solution, and react with the alkali solution. The alkali solution of a certain concentration is used to react with the carbonic acid ester in the electrolyte, to prevent the electrolyte that has been vaporized from continuing to produce harmful gas, and to process the thermal runaway smoke at the source. In addition, the alkali solution has a good treatment effect on CO2, POF3 and HF and other acidic substances, and can effectively treat the thermal runaway smoke.

[0039] Meanwhile, for the alkali solution, the greater the general concentration, the better the treatment effect on the thermal runaway smoke. However, the applicant found that the alkali solution of a low concentration has a better treatment effect than the alkali solution of a high concentration, especially the alkali solution of 0.05-0.5 mol / L, when the thermal runaway smoke passes through the alkali solution of the concentration, the amount of collected gas is the smallest, and the treatment effect is better than that of the alkali solution of a concentration of 0.5 mol / L or more. Therefore, the key of the method of the embodiment is to overcome the prejudice of the prior art, and to use the alkali solution of a low concentration to treat the thermal runaway smoke, so that the alkali solution can effectively treat the thermal runaway smoke.

[0040] Based on this, the embodiment provides a thermal runaway smoke treatment method, which includes the following processes: delivering the thermal runaway smoke generated by battery thermal runaway to 0.05-0.5 mol / L alkali solution, and treating the thermal runaway smoke to reduce the safety hazard caused by the discharge of the thermal runaway smoke.

[0041] The alkali solution can be a sodium hydroxide aqueous solution, a potassium hydroxide aqueous solution, etc. The alkali solution can not only dissolve the electrolyte in the battery thermal runaway smoke, but also has a good treatment effect on CO2, POF3 and HF and other acidic gases.

[0042] Taking the alkali solution as a NaOH solution as an example, a large number of battery thermal runaway tests are carried out, and the treatment effects of water and NaOH solutions of different concentrations on the thermal runaway smoke are compared. It is found that the volume of the gas collected after the thermal runaway smoke is treated by the NaOH solution of 0.05-0.5 mol / L is the smallest, the effect is remarkable after the thermal runaway smoke is treated by the NaOH solution of 0.1-0.2 mol / L, and the effect is the best after the thermal runaway smoke is treated by the NaOH solution of 0.1 mol / L.

[0043] When the thermal runaway smoke is transported into the NaOH solution, the NaOH solution reacts with the acidic substances in the thermal runaway smoke, such as electrolyte, CO2, POF3 and HF, for example, the ester in the electrolyte reacts with the NaOH solution: CHOOCR + NaOH = RCOONa + CHOH; CO2 reacts with the NaOH solution: 2NaOH + CO2 = Na2CO3 + H2O; the subsequent CO2 also occurs: Na2CO3 + CO2 + H2O = 2NaHCO3; POF3 reacts with the NaOH solution: POF3 + 2NaOH = NaPF2O2 + NaF + H2O; HF reacts with the NaOH solution: NaOH + HF = NaF + H2O, through the above reactions, the volume of the thermal runaway smoke is greatly reduced, and the subsequent treatment cost is greatly reduced.

[0044] Table 1 Thermal runaway data of full 32650 battery without treatment

[0045]

[0046] Table 2 Treatment results of different concentrations of NaOH solution

[0047]

[0048]

[0049] According to the above test data, it is found that when the thermal runaway smoke of the full 32650 battery after thermal runaway is not treated, the collected gas volume is 4L, when the thermal runaway smoke of the full 32650 battery after thermal runaway is treated by the NaOH solution with a concentration of 0.5mol / L or more, the collected gas is generally greater than 2L, and the treatment effect is not ideal. When the thermal runaway smoke of the full 32650 battery after thermal runaway is treated by the NaOH solution with a concentration of 0.05-0.5mol / L, the gas volume is small, all below 2L, and the effect is remarkable after treatment by the sodium hydroxide with a concentration of 0.1-0.2mol / L, the gas volume collected after treatment by the sodium hydroxide with a concentration of 0.1mol / L is the smallest, only about 1L, and the effect is the best. Therefore, the NaOH solution with a concentration of 0.05-0.5mol / L has a good treatment effect on the thermal runaway smoke after battery thermal runaway.

[0050] Example 2

[0051] As described in Example 1, a certain concentration of alkali solution can effectively treat the thermal runaway smoke, so that the volume of the treated thermal runaway smoke is greatly reduced, and on this basis, the residual gas after the above treatment is treated again by the adsorption medium, so that the treated gas is completely non-combustible and can be directly discharged, so as to improve the safety of the energy storage system.

[0052] The thermal runaway smoke treatment method provided by the embodiment is as follows:

[0053] I. The thermal runaway smoke is transported to 0.05-0.5 mol of an alkali solution for treatment;

[0054] The alkali solution is specifically a sodium hydroxide aqueous solution, a potassium hydroxide aqueous solution, or the like. The alkali solution can not only dissolve the electrolyte in the battery thermal runaway smoke, but also has a good treatment effect on acidic gases such as CO2, POF3, and HF.

[0055] II. The thermal runaway smoke treated by the alkali solution is treated by an adsorption medium;

[0056] In this process, the residual thermal runaway smoke treated by the alkali solution is adsorbed by the adsorption medium to adsorb excess H2, CO, methane, and the like. The adsorption medium is specifically activated carbon, graphene, carbon nanotubes, graphite, alumina, montmorillonite, silicate, phosphate, or porous glass. Preferably, the adsorption medium is activated carbon which has a relatively low cost and a relatively excellent treatment effect. Generally, activated carbon with a high iodine value or modified activated carbon is selected. Such activated carbon is easy to adsorb small molecular weight gases in the thermal runaway smoke, for example, hydrogen and methane.

[0057] When the thermal runaway smoke of a full 32650 battery after thermal runaway is not treated, the collected gas volume is 4L. After treatment by 0.1 mol / L NaOH solution and activated carbon, the collected gas volume is only about 0.3-0.5L, and the gas is non-flammable. Therefore, the combined treatment method can effectively treat the thermal runaway smoke generated by the battery.

[0058] Table 3 Absorption effect of P-B-3 type activated carbon on thermal runaway smoke

[0059]

[0060]

[0061] Table 4 Adsorption test of NaOH solution and activated carbon combination

[0062]

[0063] Through the test data, it is found that the effect of using NaOH solution and activated carbon (1 filter P-B-3 activated carbon) on the battery thermal runaway smoke is very good, and after many tests, it is found that the thermal runaway smoke of the full 32650 battery after thermal runaway is first treated by 1500 mL of 0.1 mol / L NaOH solution, and then adsorbed by 270 g of activated carbon (packed in 3 1 m long quarter pipes), the volume of the collected gas is 0.3-0.5 L, and the collected gas is not flammable.

[0064] After that, the test is scaled up, and the thermal runaway smoke treatment test is carried out on 2 30Ah batteries and a 202Ah battery.

[0065] Table 5 30Ah battery thermal runaway adsorption test

[0066]

[0067] Table 6 202Ah large battery thermal runaway adsorption test

[0068]

[0069] From the above test data, it can be seen that when 2 30AH batteries are thermally runaway, 3L of NaOH solution and 2KG of activated carbon can make the treated gas completely non-flammable; when a 202Ah battery is thermally runaway, 10L of NaOH solution and 6.5KG of activated carbon can make the treated gas completely non-flammable, so it can be seen that the capacity value of the battery and the corresponding relationship of the alkali solution and the adsorption medium is: the thermal runaway smoke generated by a C1AH capacity battery is treated by at least (0.05xC1)L of alkali solution and (32xC1)g of adsorption medium; under this relationship, the minimum alkali solution and adsorption medium can be used to effectively treat the thermal runaway smoke of the battery when it is thermally runaway.

[0070] Example 3

[0071] As shown in Figure 1 and Figure 2 , the present embodiment provides a thermal runaway smoke treatment device, which comprises at least one treatment tank body 1, the treatment tank body 1 is provided with a smoke inlet 13 and a smoke outlet 14; the treatment tank body 1 is filled with 0.05-0.5 mol / L alkali solution, the thermal runaway smoke passes through the smoke inlet 13 and directly reacts with the alkali solution in the treatment tank body 1, the alkali solution treats the electrolyte and gas in the thermal runaway smoke, thereby realizing effective treatment of the battery thermal runaway smoke. Specifically, the thermal runaway smoke is treated by 0.1-0.2 mol / L NaOH solution, and the effect is remarkable, and the effect is best after being treated by 0.1 mol / L NaOH solution.

[0072] The shape of the treatment tank body 1 is not limited, which can be a rectangular tank body, a circular tank body, an oval tank body, etc. In the embodiment, the treatment tank body 1 is a circular tank body, which has good pressure-bearing performance. Meanwhile, in the embodiment, the flue gas inlet 13 is arranged at the bottom of the circular tank body, and the flue gas outlet 14 is arranged at the top of the energy storage tank body. This arrangement enables the thermal runaway flue gas to fully pass through the alkali solution in the circular tank body, so that the thermal runaway flue gas is fully treated, and the treatment effect is further improved.

[0073] The treatment tank body 1 is a split structure, which can mainly adopt the following structure forms: first, the treatment tank body 1 is mainly composed of a cylinder 11 with one end open and an end cover 12 arranged at the open end; second, the treatment tank body 1 is mainly composed of a cylinder 11 with both ends open and two end covers 12 arranged at the open ends.

[0074] In the above two structures, in order to ensure the sealing performance of the treatment tank body 1, the cylinder 11 with the top open and the end cover 12 arranged at the open end are preferred to form the treatment tank body 1. When the end cover 12 is connected with the cylinder 11, the connection can be achieved by threads or flanges. Regardless of the connection mode, attention should be paid to the sealing performance of the connection. At this time, the flue gas inlet 13 can be arranged on the bottom plate of the cylinder, and the flue gas outlet 14 can be arranged on the end cover.

[0075] In addition, the treatment tank body 1 is also provided with a dispersing assembly 15 for dispersing and distributing the thermal runaway flue gas entering the treatment tank body 1, so that the thermal runaway flue gas fully contacts and reacts with the alkali solution. The dispersing assembly 15 includes at least one foamed copper column, which is fixed to the flue gas inlet 13 when installed, for dispersing and distributing the thermal runaway flue gas entering the treatment tank body 1. Foamed copper is a structure with a large number of three-dimensional pores in a copper matrix, which has a dispersing and buffering effect on fluid. In use, it is processed into a columnar structure and installed on the flue gas inlet 13. The thermal runaway flue gas enters the bottom of the foamed copper column through the flue gas inlet 13, and then flows out through the side wall or top of the foamed copper column, so as to achieve the dispersing and buffering effect on the thermal runaway flue gas.

[0076] As Figure 1 and Figure 2As shown, in the embodiment, a first one-way valve 16 is installed at the flue gas inlet 13 of the treatment tank body 1, which avoids the backflow of the alkali solution in the treatment tank body 1. Meanwhile, a second one-way valve 17 can also be arranged at the flue gas outlet 14 of the treatment tank body 1, which is used to prevent the volatilization of the alkali solution, and the second one-way valve 17 is a pressure valve that opens when the pressure of the treatment tank body 1 exceeds the threshold value after the hot runaway flue gas flows into the treatment tank body 1. In other embodiments, an electromagnetic valve can also be arranged at the flue gas outlet 14 of the treatment tank body 1, which is a normally closed valve and is in a closed state at ordinary times to prevent the volatilization of the alkali solution, and the battery management system BMS opens the electromagnetic valve when the battery is out of control.

[0077] In addition, as shown, a porous plate 18 can also be arranged at the top of the inner cavity of the treatment tank body 1, and the porous plate 18 is used to place the adsorption medium. When the hot runaway flue gas passes through the alkali solution, it will carry part of the alkali solution, which can be adsorbed by the adsorption medium on the porous plate 18 to make the gas discharged from the treatment tank body 1 safer. Figure 2

[0078] Embodiment 4

[0079] As shown, the hot runaway flue gas treatment device in the embodiment is similar to that in Embodiment 3, and the difference between the two is that the hot runaway flue gas treatment device in the embodiment further includes an adsorption pipeline 2 connected to the outlet end of the above-mentioned treatment tank body 1, and the adsorption pipeline 2 is filled with adsorption medium, which is used to treat the residual gas after the treatment of the treatment tank body 1. Figure 3 The above-mentioned adsorption pipeline 2 can be an elongated pipeline filled with adsorption medium, which prolongs the adsorption path of the adsorption medium, so that the hot runaway flue gas fully contacts and reacts with the adsorption medium in the elongated pipeline. When connected, the end of the elongated pipeline is provided with threads and connected to the flue gas outlet 14 of the treatment tank body 1 or the second one-way valve 17.

[0080] The above-mentioned adsorption pipeline 2 is filled with adsorption medium, which is specifically activated carbon, graphene, carbon nanotubes, graphite, alumina, montmorillonite, silicate, phosphate or porous glass, etc., which is used to treat the residual gas after the treatment of the treatment tank body 1, such as adsorbing excess H2, CO, methane, etc. Since the alkali in the treatment tank body 1 has been treated to the hot runaway flue gas, the amount of adsorption medium filled in the adsorption pipeline 2 can be greatly reduced, so that the treatment cost of the hot runaway flue gas is greatly reduced.

[0081]

[0082] ​​The thermal runaway smoke treatment device in the embodiment introduces the thermal runaway smoke generated by the battery thermal runaway into the treatment tank body 1 for treatment. The treatment tank body 1 processes the electrolyte and part of the gas carried in the battery thermal runaway smoke, prevents the vaporized electrolyte from continuing to decompose to generate gas, thereby reducing the gas production of the battery thermal runaway gas. The subsequent adsorption pipeline 2 can complete the treatment of the thermal runaway smoke by using less adsorption medium. At the same time, the treated gas is not flammable, which improves the safety of the energy storage equipment.

Claims

1. A thermal runaway smoke treatment device, characterized in that, The application relates to a battery thermal runaway smoke treatment device, which comprises at least one treatment tank body, and a flue gas inlet and a flue gas outlet are arranged on the treatment tank body; 0.05-0.5 mol / L alkali solution is filled in the treatment tank body, and the alkali solution is used for reacting and treating electrolyte and part of gas in thermal runaway flue gas generated by battery thermal runaway.

2. The thermal runaway gas fume treatment device of claim 1, wherein, The alkali solution in the treatment tank body is 0.1-0.2 mol / L NaOH solution.

3. The thermal runaway gas handling device of claim 1, wherein, The alkali solution in the treatment tank body is 0.1 mol / L NaOH solution.

4. The thermal runaway gas fume treatment device according to any one of claims 1 to 3, wherein, A dispersing assembly is arranged in the treatment tank body and used for dispersing and shunting the thermal runaway flue gas entering the treatment tank body.

5. The thermal runaway gas fume treatment device according to any one of claims 1 to 3, wherein, A first one-way valve is arranged at the flue gas inlet of the treatment tank body, and a second one-way valve is arranged at the flue gas outlet.

6. The thermal runaway gas fume treatment device according to any one of claims 1 to 3, wherein, A perforated plate is further arranged at the top of the cavity of the treatment tank body.

7. The thermal runaway gas fume treatment device according to any one of claims 1 to 3, wherein, The treatment tank body comprises a cylinder body with an open top and an end cover which is sealingly arranged at the open end; the flue gas inlet is arranged on the bottom plate of the cylinder body, and the flue gas outlet is arranged on the end cover.

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