Battery pack with flue gas treatment function, and energy storage cabinet

Abstract

The embodiments of the present application relate to the technical field of energy storage. Provided are a battery pack with a flue gas treatment function, and an energy storage cabinet comprising the battery pack. The battery pack comprises a first battery and a flue gas treatment device, wherein the first battery comprises a first battery case, a first pressure relief valve and a plurality of battery cells; the first pressure relief valve is disposed on the first battery case and is configured to discharge gas in the first battery case; the plurality of battery cells are disposed within the first battery case; the flue gas treatment device comprises a mounting case and a catalyst; the mounting case is fixed on the first battery case and comprises a chamber; the mounting case has a first inlet and an outlet that are in communication with the chamber, with the first inlet being sealingly connected to the first pressure relief valve; and the catalyst is disposed in the chamber and used for catalytic combustion. Flue gas generated after thermal runaway of a battery can be treated, thereby reducing the risk of the accumulation, combustion and explosion of flammable gases.

Description

Battery pack and energy storage cabinet with flue gas treatment function

[0001] The present application claims priority to the Chinese patent application No. 202410855972.2, filed on June 27, 2024, and entitled "Battery pack and energy storage cabinet with flue gas treatment function", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of energy storage, and in particular to a battery pack with flue gas treatment function and an energy storage cabinet. BACKGROUND

[0003] With the emergence of energy crisis worldwide and the driving of the double carbon target, the electrochemical energy storage industry is booming, and batteries (e.g., lithium batteries) are widely used in more fields. However, the flue gas generated after the thermal runaway of the battery includes a large amount of flammable gas, such as H2, CO, CH4, etc. In some use environments, there is usually no good ventilation measure and condition, and once the flammable gas is gathered in a large amount in the space, there will be a great risk of combustion and explosion.

[0004] In the related art, the flue gas discharged from the thermal runaway battery is supplied through a pipeline, and an ignition device is arranged at the end of the pipeline to ignite the just discharged flue gas, so that the flue gas will not gather in a large amount in the outside. However, the scheme in the related art has certain safety risks. SUMMARY

[0005] The present application provides a battery pack with flue gas treatment function and an energy storage cabinet including the battery pack, which can treat the flue gas after the thermal runaway of the battery and reduce the risk of flammable gas gathering and combustion and explosion.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0007] In a first aspect, the present application provides a battery pack with flue gas treatment function, which includes a first battery and a flue gas treatment device. The first battery includes a first battery shell, a first pressure relief valve and a plurality of battery cells. The first pressure relief valve is arranged on the first battery shell and is used to discharge the gas in the first battery shell. The plurality of battery cells are arranged in the first battery shell. The flue gas treatment device includes a mounting shell and a catalyst. The mounting shell is fixed on the first battery shell and includes a cavity, a first inlet and an outlet which are in communication with the cavity. The first inlet is in sealed connection with the first pressure relief valve. The catalyst is arranged in the cavity and is used for catalytic combustion.

[0008] When the first battery is in thermal runaway, the thermal runaway gas (hereinafter referred to as "smoke") in the first battery will be sprayed out from the first pressure relief valve, the sprayed smoke includes some flammable gases, such as H2, CO, CH4, volatile organic compounds (VOC), etc. The smoke sprayed from the first pressure relief valve enters the cavity of the installation shell through the first inlet of the smoke treatment device, and then contacts the catalyst in the cavity. Under the action of the catalyst, the flameless combustion (oxidation) occurs, and the non-toxic water and carbon dioxide are generated, and finally discharged from the outlet. By treating the smoke discharged after the battery is in thermal runaway through the catalyst in the smoke treatment device, the possibility of large accumulation of flammable gas in the external space is reduced, and the risk of combustion and explosion of flammable gas is reduced. In addition, since the catalytic combustion is flameless combustion, there is no obvious flame (open flame generated by flaming combustion) at the outlet of the installation shell, which reduces the safety hazard.

[0009] In an optional embodiment, the smoke treatment device further comprises a heating element, the heating element is at least partially located in the cavity, and the heating element is used to heat the gas in the cavity, or the heating element contacts the catalyst and is used to heat the catalyst.

[0010] The heating element is provided as a heat source to heat the catalyst or the smoke entering the cavity. The increase in temperature can enhance the catalytic activity of the catalyst, improve the catalytic ability, and in addition, the increase in temperature can also increase the kinetic energy of the reactant molecules, so that the reactants are more easily activated, thereby increasing the reaction rate. More flammable gases in the smoke are catalytically combusted, the amount of flammable gas emission is reduced, and the risk of combustion and explosion is reduced.

[0011] In an optional embodiment, the heating element comprises a resistance wire and a plurality of fins, the resistance wire and the plurality of fins are both arranged in the cavity, the resistance wire is fixed on the inner wall surface of the cavity, the plurality of fins are fixedly connected with the resistance wire, and at least one of the plurality of fins extends into the catalyst.

[0012] The plurality of fins conduct the heat of the resistance wire to the periphery of the resistance wire, diffuse the heat range, and can increase the temperature of the gas and the catalyst around the heating element, so as to improve the rate of catalytic reaction. And at least one fin extends into the catalyst, which increases the heating area of the catalyst, is conducive to heating the catalyst, and further enhances the catalytic ability of the catalyst.

[0013] In an optional embodiment, the part of the heating element located in the cavity is coated with peroxide or solid oxygen.

[0014] After the temperature of the heating element increases, the peroxide or solid oxygen (oxygen candle) on the heating element decomposes to generate oxygen, which supplies oxygen for the catalytic reaction and supports the normal progress of the catalytic reaction. In addition, by setting the peroxide or solid oxygen to supply additional oxygen, the rate of catalytic reaction can be improved.

[0015] In an alternative embodiment, the flue gas treatment device further comprises a carrier arranged in the chamber, the carrier carrying the catalyst, and the heating element extends into the carrier.

[0016] In the supported catalyst, the carrier (support) of the catalyst is the skeleton of the active component of the catalyst, supports the active component and disperses the active component, in addition, it can increase the strength of the catalyst, and the catalyst is arranged on the carrier, and the carrier is arranged in the chamber, which facilitates the catalytic action of the catalyst in the chamber. The heating element extends into the carrier, which can heat the catalyst on or inside the carrier, thereby enhancing the catalytic ability of the catalyst.

[0017] In an alternative embodiment, the catalyst is a metal catalyst, or the catalyst is a metal oxide catalyst.

[0018] The metal catalyst or the metal oxide catalyst exhibits high activity in the catalytic reaction, which can accelerate the reaction rate, and the metal catalyst or the metal oxide catalyst can maintain good stability in a wide temperature and pressure range, and can continue to function for a long time in the reaction. In addition, the metal catalyst can be reused, and the metal oxide catalyst can be regenerated to restore its catalytic activity, thereby achieving long-term use and reducing the cost of preparing and replacing the catalyst.

[0019] In an alternative embodiment, the catalyst comprises at least one of Pt, Rh, Pd, PtO2, Rh2O3, RhO2 or PdO.

[0020] The noble metals such as platinum, rhodium, palladium and their oxides have strong catalytic ability as catalysts, which can realize catalytic reaction at a lower temperature, reduce the energy required for chemical reaction, and improve the speed of catalytic reaction. In addition, noble metals are relatively stable and are not easily oxidized or reduced in chemical reactions, which can maintain their catalytic properties for a long time during the reaction process, and have high corrosion resistance, thereby maintaining a long service life.

[0021] In an alternative embodiment, the flue gas treatment device further comprises a suction member for filtering gas, the suction member being arranged in the chamber, at least part of the suction member being located downstream of the first inlet, the catalyst being located downstream of the suction member, and the outlet being located downstream of at least part of the catalyst.

[0022] The suction accessory has strong adsorption capacity and can filter the flue gas. The downstream of the first inlet is provided with the suction accessory, and the catalyst is located downstream of the suction accessory. In this way, the flue gas discharged from the first pressure relief valve will first pass through the suction accessory before contacting the catalyst. The suction accessory can adsorb solid particles (such as carbon powder particles, diaphragm fragments, electrode particles, etc.) and electrolyte droplets in the flue gas, so that the filtered flue gas contacts the catalyst, reducing the impact of solid particles and impurities on the catalytic reaction, and facilitating the stable performance of the catalytic reaction.

[0023] In an alternative embodiment, the flue gas treatment device further comprises a partition provided in the chamber, the chamber comprises an adsorption chamber and a catalytic chamber located on different sides of the partition, the adsorption chamber is communicated with the first inlet and internally provided with a suction accessory, the catalytic chamber is communicated with the outlet and internally provided with a catalyst, and the adsorption chamber is communicated with the catalytic chamber and the communication position is located upstream of the catalyst.

[0024] The chamber is divided into two sub-chambers by the partition, one is the adsorption chamber provided with the suction accessory, and the other is the catalytic chamber provided with the catalyst. The partition reduces the possibility of random movement of the suction accessory and the catalyst, so that they do not interfere with each other.

[0025] In an alternative embodiment, the partition is provided with a through hole, and the adsorption chamber is communicated with the catalytic chamber through the through hole; or, the end of the partition and the part of the inner wall surface of the chamber opposite to the end have a gap, and the adsorption chamber and the catalytic chamber are communicated through the gap.

[0026] After the flue gas enters the chamber, it will first enter the adsorption chamber. After the flue gas is filtered by the suction accessory, it will enter the catalytic chamber through the through hole on the partition or the gap between the partition and the inner wall surface of the chamber, and react with the catalyst in the catalytic chamber. Under the action of the catalyst, the flue gas is oxidized and burned to produce water and carbon dioxide, which is then discharged from the outlet.

[0027] In an alternative embodiment, the mounting shell and the first battery shell are distributed along a first direction, the mounting shell extends along the first direction away from the first battery shell, one end of the mounting shell close to the first battery shell is provided with the first inlet, and the other end of the mounting shell away from the first battery shell is provided with the outlet. The partition is located between the first inlet and the outlet.

[0028] The mounting shell extends along the first direction, that is, the mounting shell adopts a structure similar to a straight pipe. The suction accessory is arranged on the side of the partition facing the first inlet, and the catalyst is arranged on the side of the partition facing the outlet. When the flue gas enters from the first inlet, it will first pass through the suction accessory for filtration, and then be flameless burned under the action of the catalyst, so that the combustible gas is catalyzed into water and carbon dioxide, which is then discharged from the outlet.

[0029] In an alternative embodiment, the size of the adsorption cavity in the second direction and the size of the catalytic cavity in the second direction are both greater than the size of the first battery shell in the second direction; the catalytic cavities and the adsorption cavities are distributed along the first direction, and the catalytic cavities are located on the side of the adsorption cavities away from the first battery shell; or the catalytic cavities and the adsorption cavities are distributed along the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0030] The adsorption cavities and the catalytic cavities extending in the second direction are arranged in the first direction or in the third direction, which can extend the length of the cavities, i.e. the length of the adsorption cavities and the catalytic cavities respectively, so as to facilitate the adsorption cavities to communicate with the first inlet and the second inlet at the same time. Moreover, the longer adsorption cavities and catalytic cavities can be provided with more adsorption members and catalysts respectively, which is conducive to the filtration and catalytic combustion of the flue gas.

[0031] In an alternative embodiment, the size of the region in the catalytic cavity provided with the catalyst in the second direction is greater than the size of the first battery shell in the second direction.

[0032] When a large amount of flue gas is generated after the battery thermal runaway, the region in the catalytic cavity provided with the catalyst is longer, which can increase the amount of catalyst. More catalysts in the catalytic cavity react with the flue gas, so that the catalytic capacity of the flue gas treatment device is stronger, which meets the gas production requirement of the battery, reduces the possibility of a large amount of combustible gas discharged from the battery gathering in the external space, and reduces the risk of combustion and explosion of the combustible gas.

[0033] In an alternative embodiment, the position of the adsorption cavity communicating with the catalytic cavity and the outlet are located at different ends of the catalyst in the second direction respectively.

[0034] By arranging the communication position and the outlet at different ends of the catalyst, the flue gas entering the catalytic cavity can pass through the entire catalyst before being discharged, which further enhances the effect of catalytic combustion.

[0035] In an alternative embodiment, the flue gas treatment device further comprises a first fan, which is in communication with the mounting shell and is used to blow air into the cavity. The catalyst is arranged downstream of the first fan.

[0036] The first fan (or air pump, wind pump) is used to provide air to the catalyst, so as to provide the required oxygen for the catalytic reaction and improve the oxygen supply capacity.

[0037] In an alternative embodiment, the mounting shell and the first battery shell are distributed along the first direction, and the cross section of the cavity perpendicular to the first direction is at least partially in a spiral, bent or curved shape.

[0038] At least part of the chamber is in a spiral, zigzag or curved shape (for example, a snake shape), which can extend the length of the chamber in the installation shell, so that more catalysts and adsorption components can be arranged in the chamber. In addition, the chamber does not extend in the first direction, which reduces the thickness of the installation shell and reduces the space occupied by the installation shell in the first direction.

[0039] In an optional embodiment, the first pressure relief valve is located on one side of the first battery shell in the first direction, the installation shell includes a first part and a second part that are in communication with each other, the first part is located on one side of the first battery shell in the first direction, the first inlet is arranged on the first part, the second part is located on one side of the first battery shell in the second direction, the outlet is arranged on the second part, and the catalyst is arranged in the second part. The second direction is perpendicular to the first direction.

[0040] When the first battery is in thermal runaway, the flue gas enters the chamber from the first inlet on the first part, and the flue gas enters the second part from the first part to react with the catalyst. The combustible gas in the flue gas is catalytically combusted under the action of the catalyst to generate water and carbon dioxide, which is discharged from the outlet of the second part.

[0041] In an optional embodiment, the size of the first part in the third direction is smaller than the size of the first battery shell in the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0042] Through the above design, the size of the first part can be reduced, and only one tubular structure can be used to realize the conduction function, that is, to guide the thermal runaway flue gas into the second part.

[0043] In an optional embodiment, the flue gas treatment device further comprises a flame arrester arranged at the outlet, the flame arrester comprises a plurality of channels for dividing the flame, and the plurality of channels are in communication with the chamber.

[0044] The flame arrester is arranged at the outlet, and the flame arrester is arranged at the outlet. Before the open flame is ejected from the outlet, it will pass through the flame arrester first. The plurality of channels in the flame arrester will divide the large area of flame into many small flames, thereby increasing the speed of heat dissipation. The concentration of combustible gas and the oxygen content in the channel will be reduced due to diffusion, which is not enough to maintain the combustion of the flame. In addition, when the flame passes through the channel, the flame will collide with the channel wall, thereby further reducing the speed and intensity of the flame. Under a series of actions, the flame is gradually extinguished in the flame arrester, thereby reducing the possibility of flame spread.

[0045] In an optional embodiment, the battery pack further comprises a cooling assembly, the cooling assembly comprises a second fan, the second fan is arranged outside the installation shell, and the air outlet of the second fan is arranged towards the installation shell; or the cooling assembly comprises a liquid cooling plate, and the liquid cooling plate contacts the installation shell.

[0046] When the first battery generates a large amount of flue gas after thermal runaway, the flue gas is oxidized and combusted under the action of the catalyst, and a large amount of heat is generated in the process, which affects the first battery or other equipment located around the mounting shell. The cooling assembly is used to cool the mounting shell (air cooling or liquid cooling), which can control the temperature and reaction rate of the catalytic reaction, reduce the possibility of reaction runaway, and also reduce the impact of the high temperature of the mounting shell on the surrounding equipment or personnel.

[0047] In an optional embodiment, the battery pack further comprises a sealing ring, which is arranged around the first inlet and clamped between the mounting shell and the first battery shell.

[0048] When the mounting shell is installed on the first battery shell, the mounting shell and the first battery shell will compress the sealing ring, which is arranged around the outer periphery of the first inlet to play a sealing role, so that the gas or other substances in the mounting shell or the first battery shell will not leak from the connection between the two, reducing the possibility of flue gas flowing out to the outside after the first battery thermal runaway, and reducing the risk of flammable gas accumulation in the outside.

[0049] In a second aspect of the present application, a power storage cabinet is provided, which comprises a battery manager and the above-mentioned battery pack, and the battery manager is electrically connected to at least part of the plurality of battery cells.

[0050] The power storage cabinet provided by the present application comprises the above-mentioned battery pack, so the power storage cabinet provided by the present application and the battery pack of the above-mentioned technical solution can solve the same technical problems and have the same technical effects, which will not be described here.

[0051] In an optional embodiment, the power storage cabinet further comprises a second battery, the second battery comprises a second battery shell and a second pressure relief valve, the second battery shell is distributed along a second direction with the first battery shell, the mounting shell is distributed along a first direction with the first battery shell, the first direction is perpendicular to the second direction, and the second pressure relief valve is arranged on the side of the second battery shell facing the mounting shell; the mounting shell further comprises a second inlet communicating with the adsorption cavity, the first inlet and the second inlet are arranged along the second direction, the second inlet is sealingly connected with the second pressure relief valve, and at least part of the adsorption member is located downstream of the second inlet.

[0052] When any one of the first battery and the second battery undergoes thermal runaway, flue gas will enter the adsorption cavity of the mounting shell from the first inlet or the second inlet, and the downstream of the first inlet and the second inlet is provided with an adsorption member, so that whether the first battery or the second battery undergoes thermal runaway, the flue gas discharged therefrom can be adsorbed and filtered by the adsorption member, then catalytically combusted by the catalyst, and finally discharged from the outlet. That is, the first battery and the second battery share the flue gas treatment device, reducing the number of flue gas treatment devices and facilitating the installation of the flue gas treatment device.

[0053] In an alternative embodiment, the energy storage cabinet further comprises a cabinet body, the first battery is arranged in the cabinet body, a part of the mounting shell is arranged in the cabinet body and connected with the first battery shell, and another part of the mounting shell extends out of the cabinet body, and the catalyst is arranged in the part of the mounting shell extending out of the cabinet body.

[0054] Arranging the first battery in the cabinet body (or the box body) and arranging the catalyst outside the cabinet body reduces the influence of heat in the catalysis process on the temperature in the cabinet body, so that the thermal runaway is not spread in the cabinet body. BRIEF DESCRIPTION OF DRAWINGS

[0055] FIG. 1 is a schematic diagram of the overall structure of an energy storage cabinet according to an embodiment of the present application;

[0056] FIG. 2 is a schematic diagram of an explosion structure of a battery pack according to an embodiment of the present application;

[0057] FIG. 3 is a schematic diagram of the internal structure of a flue gas treatment device according to an embodiment of the present application;

[0058] FIG. 4 is a schematic diagram of the internal structure of another flue gas treatment device according to an embodiment of the present application;

[0059] FIG. 5 is a schematic diagram of the structure of a heating element according to an embodiment of the present application;

[0060] FIG. 6 is a schematic diagram of the structure of another heating element according to an embodiment of the present application;

[0061] FIG. 7 is a schematic diagram of the structure of still another heating element according to an embodiment of the present application;

[0062] FIG. 8 is a schematic diagram of the structure of an outlet according to an embodiment of the present application;

[0063] FIG. 9 is a schematic diagram of the structure of another outlet according to an embodiment of the present application;

[0064] FIG. 10 is a schematic diagram of the internal structure of still another flue gas treatment device according to an embodiment of the present application;

[0065] FIG. 11 is a schematic diagram of the structure of a partition according to an embodiment of the present application;

[0066] FIG. 12 is a schematic diagram of the internal structure of still another flue gas treatment device according to an embodiment of the present application;

[0067] FIG. 13 is a schematic diagram of the overall structure of another energy storage cabinet according to an embodiment of the present application;

[0068] FIG. 14 is a schematic diagram of the structure of another flue gas treatment device according to an embodiment of the present application;

[0069] FIG. 15 is a schematic diagram of the internal structure of still another flue gas treatment device according to an embodiment of the present application;

[0070] Figure 16 is a schematic diagram of an adsorbent and catalyst arrangement provided in an embodiment of this application;

[0071] Figure 17 is a schematic diagram of the internal structure of another flue gas treatment device provided in an embodiment of this application;

[0072] Figure 18 is a schematic diagram of the internal structure of another flue gas treatment device provided in an embodiment of this application;

[0073] Figure 19 is a schematic diagram of the internal structure of another flue gas treatment device provided in an embodiment of this application;

[0074] Figure 20 is a schematic diagram of the overall structure of another energy storage cabinet provided in an embodiment of this application;

[0075] Figure 21 is a schematic diagram of the internal structure of another flue gas treatment device provided in an embodiment of this application;

[0076] Figure 22 is a schematic diagram of the overall structure of another energy storage cabinet provided in an embodiment of this application;

[0077] Figure 23 is a partial structural schematic diagram of another energy storage cabinet provided in an embodiment of this application;

[0078] Figure 24 is a structural schematic diagram of a first fan provided in an embodiment of this application;

[0079] Figure 25 is a partial structural schematic diagram of another energy storage cabinet provided in an embodiment of this application.

[0080] Reference numerals: 100-Energy storage cabinet; 200-Battery pack; 300-Battery manager; 1-First battery; 11-First battery casing; 12-First pressure relief valve; 13-Battery cell; 2-Flue gas treatment device; 21-Mounting shell; 210-Cavity; 2101-Adsorption chamber; 2102-Catalytic chamber; 211-First inlet; 212-Second inlet; 213-Third inlet; 214-Outlet; 2141-Orifice; 215-First part; 216-Second part; 22-Catalyst; 23-Carrier; 24-Heating element; 241-Resistance wire; 242-Fin; 25-Adsorption element; 26-Separator; 261-Through hole; 262-Gap; 27-First fan; 28-Barrier; 29-Flame arrester; 291-Channel; 3-Sealing ring; 4-Second battery; 41-Second battery shell; 42-Second pressure relief valve; 5-Third battery; 6-Cabinet; 71-Second fan; 72-Liquid cooling plate. Detailed Implementation

[0081] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0082] In the present application, unless specifically defined and limited otherwise, the terms "upper", "lower", "front", "rear", "left", "right" and the like indicate the orientation or positional relationship as shown in the drawings, which can include but not limited to the orientation of the components shown in the drawings, and these directional terms can be relative concepts, which are used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the components shown in the drawings, and cannot be understood as a limitation to the present application.

[0083] In the present application, the terms "first", "second" and the like are only used for descriptive purposes, and are used to distinguish one element from another element, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features.

[0084] In the present application, unless specifically defined and limited otherwise, the meaning of "multiple" is two or more.

[0085] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be a non-detachable connection (including but not limited to integral connection, welding, etc.), or a detachable connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium; it can be the internal connection of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, when describing pipelines or channels, the terms "connecting" and "connecting" used in the present application have the meaning of conducting. The specific meaning should be understood in combination with the context.

[0086] In addition, in the present application, the words "exemplary" or "for example" are used to represent an example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. On the contrary, the words "exemplary" or "for example" are intended to present the relevant concept in a specific way.

[0087] In the drawings of the embodiments of the present application, the entity structure of components, assemblies and the like is represented by a guide line; the hollow structure of openings, holes, spaces, cavities and the like is represented by a guide line with an arrow.

[0088] The energy storage cabinet 100 with the flue gas treatment function provided by the embodiments of the present application is shown in Fig. 1. The energy storage cabinet 100 with the flue gas treatment function is shown in Fig. 1. Referring to Fig. 1, the energy storage cabinet 100 includes a battery pack 200, and the battery pack 200 includes a first battery 1 and a flue gas treatment device 2. The flue gas treatment device 2 is arranged on one side of the first battery 1. For example, the flue gas treatment device 2 and the first battery 1 are distributed along a first direction shown in the figure.

[0089] Fig. 2 shows an exploded view of the battery pack 200 in Fig. 1. The first battery 1 includes a first battery shell 11, a first pressure relief valve 12 (which can also be referred to as a first explosion-proof valve), and a plurality of battery cells 13. In Fig. 2, the plurality of battery cells 13 of the first battery 1 are indicated by a dashed box located in the first battery shell 11, and the plurality of battery cells 13 are arranged in the first battery shell 11. The first pressure relief valve 12 is arranged on the first battery shell 11. The first pressure relief valve 12 is used to balance the pressure in the first battery shell 11. When the first battery 1 is in thermal runaway, the first pressure relief valve 12 is opened and the flue gas generated by the thermal runaway of the first battery 1 is discharged to the outside of the first battery shell 11.

[0090] In an example, the first pressure relief valve 12 can protrude outwardly from the first battery shell 11. In other examples, the outer side of the first pressure relief valve 12 can be flush with the outer wall of the first battery shell 11, or the first pressure relief valve 12 does not protrude outwardly from the first battery shell 11. In addition, the structure of the first pressure relief valve 12 can be any suitable pressure relief valve structure or explosion-proof valve structure, which is not limited in the present application.

[0091] Referring to Fig. 2, the energy storage cabinet 100 also includes a battery manager 300, which can constitute all or part of a battery management system (BMS). The battery manager 300 can monitor the state of the first battery 1, improve the utilization rate of the first battery 1, prevent overcharging and overdischarging of the first battery 1, and prolong the service life of the first battery 1. The battery manager 300 is electrically connected to at least part of the plurality of battery cells 13 (one battery cell 13 in the first battery shell 11, the plurality of battery cells 13, or all battery cells 13). The battery manager 300 is used to control the battery cells 13 electrically connected thereto. In an example, referring to Fig. 2, the battery manager 300 (the dashed box indicated by reference numeral 300 in Fig. 2) can be arranged in the first battery shell 11. In other examples, the battery manager 300 can also be arranged outside the first battery shell 11, which is not limited in the present application. In other examples, the battery manager 300 can also be other structures for controlling the battery cells 13.

[0092] FIG. 3 illustrates an internal structure of the smoke treatment device 2. Referring to FIG. 3, the smoke treatment device 2 includes a mounting shell 21 located at a side of the first battery shell 11 where the first pressure relief valve 12 is arranged, and the mounting shell 21 is connected to the first battery shell 11, for example, the mounting shell 21 is bonded, welded, bolted, or the like to the first battery shell 11, and the present application does not limit the connection mode between the mounting shell 21 and the first battery shell 11.

[0093] The mounting shell 21 is provided with a chamber 210. Referring to FIG. 3, the mounting shell 21 has a first inlet 211 and an outlet 214 in communication with the chamber 210, and the first inlet 211 is sealingly connected to the first pressure relief valve 12, for example, the first inlet 211 is arranged opposite to the first pressure relief valve 12 in position, and a sealing structure is arranged between the first inlet 211 and the first pressure relief valve 12, so that when the first battery 1 is in thermal runaway, the first pressure relief valve 12 is opened, and the smoke emitted from the first pressure relief valve 12 enters the chamber 210 from the first inlet 211.

[0094] Regarding the cooperation structure between the first pressure relief valve 12 and the first inlet 211, in the example shown in FIG. 3, the first pressure relief valve 12 protrudes outside the first battery shell 11 and at least partially extends into the first inlet 211. In other examples, the first pressure relief valve 12 extends into the chamber 210 through the first inlet 211. In other examples, the first pressure relief valve 12 is only opposite or towards the first inlet 211, without extending into the first inlet 211 or the chamber 210. It can be understood that the first inlet 211 is arranged opposite to the first pressure relief valve 12, and the first pressure relief valve 12 in the open state allows the smoke in the first battery 1 to enter the chamber 210 through the first inlet 211, and it can also be understood that when the first pressure relief valve 12 is opened, the internal space of the first battery 1 is in communication with the chamber 210.

[0095] The first inlet 211 can have any suitable shape. In some examples, referring to FIG. 3, the first inlet 211 can be a through hole (circular, square, or irregular) provided on the side wall of the mounting shell 21 towards the first battery shell 11, and the peripheral wall of the through hole can surround the periphery of the valve port or the pressure relief channel of the first pressure relief valve 12. Referring back to FIG. 2, the energy storage cabinet 100 further includes a sealing ring 3 arranged around the first inlet 211, and the sealing ring 3 is clamped between the mounting shell 21 and the first battery shell 11. When the mounting shell 21 is mounted on the first battery shell 11, the mounting shell 21 and the first battery shell 11 will compress the sealing ring 3, and the sealing ring 3 arranged around the outer periphery of the first inlet 211 plays a sealing role, so that the gas or other substances in the mounting shell 21 or the first battery shell 11 cannot leak from the connection between the two, reducing the possibility of smoke flowing out to the outside after the first battery 1 is in thermal runaway, and reducing the risk of flammable gas accumulating in the outside.

[0096] In some other examples, the first inlet 211 can be a port on the side of the mounting shell 21 facing the first battery 1 (the internal structure is omitted). FIG. 4 exemplarily shows the internal structure of another flue gas treatment device 2, and the side of the mounting shell 21 facing the first battery 1 is not provided with a side wall. It can be understood that the side wall of the mounting shell 21 facing the first battery 1 is removed to form a port-shaped first inlet 211. The first inlet 211 in this example can also be understood as a port of a pipe structure.

[0097] The flue gas treatment device 2 further comprises a catalyst 22. FIG. 5 exemplarily shows the structure of a chamber 210. Referring to FIG. 5, the catalyst 22 is arranged in the chamber 210, for example, the catalyst 22 is filled in the chamber 210, and the catalyst 22 is used for catalytic combustion. The shaded part in FIG. 5 refers to the catalyst 22. The catalytic combustion is to heat the gas to a decomposition temperature to purify the gas under the action of the catalyst 22. Since the catalyst 22 reduces the activation energy, the combustible gas can be subjected to flameless catalytic combustion at a lower temperature. The arrow 211 in FIG. 5 exemplarily indicates the approximate position of the first inlet 211, and the arrow 214 exemplarily indicates the approximate position of the outlet 214.

[0098] When the first battery 1 is in thermal runaway, the flue gas in the first battery 1 is sprayed from the first pressure relief valve 12. The sprayed flue gas comprises some combustible gases, such as H2, CO, CH4, volatile organic compounds (VOC), etc. The flue gas sprayed from the first pressure relief valve 12 enters the chamber 210 through the first inlet 211, and then reacts with the catalyst 22. Under the action of the catalyst 22, the flue gas is subjected to flameless combustion (oxidation), and produces non-toxic water and carbon dioxide, which are finally discharged from the outlet 214. By treating the flue gas discharged from the battery in thermal runaway by the catalyst 22 in the flue gas treatment device 2, the possibility of a large amount of combustible gas accumulating in the external space is reduced. For example, when the energy storage device is a household energy storage device, the flue gas discharged from the first battery 1 is subjected to catalytic combustion by the catalyst 22, and the gas discharged into the room is non-combustible gas, thereby reducing the risk of combustion and explosion.

[0099] In addition, since the catalytic combustion is flameless combustion, there is no obvious flame (open flame generated by flaming combustion) at the outlet 214 of the mounting shell 21, thereby reducing the safety hazard.

[0100] In some examples, the catalyst 22 is a metal catalyst, that is, the catalyst 22 is a solid catalyst with a metal as the main active component, for example, the catalyst 22 can be at least one of Fe, Mn, Co, Ni, etc. In other examples, the catalyst 22 is a metal oxide catalyst, that is, the catalyst 22 is a catalyst with a metal oxide as the main catalytically active component, for example, the catalyst 22 can be at least one of TiO2, ZnO, Fe2O3, etc., and the catalyst 22 can also be an oxide of Cr, Mn, Fe, Co, Cu, etc.

[0101] The metal catalyst or the metal oxide catalyst exhibits high activity in the catalytic reaction, can accelerate the reaction rate, and can maintain good stability in a wide temperature and pressure range, and can continue to function for a long time in the reaction. In addition, the metal catalyst can be reused, and the metal oxide catalyst can be regenerated to restore its catalytic activity, thereby achieving long-term use and reducing the cost of preparing and replacing the catalyst 22.

[0102] In examples where the catalyst 22 is a metal catalyst, the catalyst 22 can be a noble metal catalyst, for example, the catalyst 22 is at least one of Pd, Pt, Ru, Rh, etc. In examples where the catalyst 22 is a metal oxide catalyst, the catalyst 22 can be a noble metal oxide catalyst, for example, the catalyst 22 is at least one of PtO2, Rh2O3, RhO2, PdO, etc.

[0103] The noble metals Pd, Pt, Ru, Rh, etc. and their oxides have strong catalytic ability, can achieve catalytic reaction at a lower temperature, reduce the energy required for chemical reaction, and improve the speed of catalytic reaction. In addition, noble metals are relatively stable and are not easily oxidized or reduced in chemical reactions, can maintain their catalytic properties for a long time during the reaction, and have high corrosion resistance, thereby maintaining a long service life.

[0104] In one example, the catalyst 22 of the present application only includes one kind of catalyst. In other examples, the catalyst 22 of the present application includes multiple kinds of catalysts, which can also be understood as a mixture of multiple catalysts capable of catalyzing combustion, constituting the catalyst 22 of the present application.

[0105] In other examples, the catalyst 22 can also be a non-metal catalyst capable of catalyzing combustion.

[0106] In the example where the catalyst 22 is a supported catalyst, referring to FIG. 5, the flue gas treatment device 2 can further include a carrier 23 that carries the catalyst 22, and the carrier 23 carrying the catalyst 22 is arranged in the chamber 210. The carrier 23 (support) of the catalyst 22 is the skeleton of the active component of the catalyst 22, supports and disperses the active component, and in addition, can increase the strength of the catalyst 22. By arranging the catalyst 22 on the carrier 23 and arranging the carrier 23 in the chamber 210, the catalyst 22 can be catalyzed in the chamber 210. The carrier 23 carrying the catalyst 22 can be in any suitable structure, for example, the carrier 23 can be a metal oxide carrier, a molecular sieve carrier, etc., and the structure and number of the carrier 23 are not limited in the present application.

[0107] In some examples, the carrier 23 described above can be in an integral structure and installed in the chamber 210. In other examples, the carrier 23 described above can include a plurality of sub-carriers, each of which carries part of the catalyst 22, and the plurality of sub-carriers are filled in the chamber 210.

[0108] In the example where the catalyst 22 is a non-supported catalyst, the carrier 23 can also not be arranged, and the catalyst 22 is directly filled in the chamber 210.

[0109] In some examples, referring to FIG. 5, the flue gas treatment device 2 can further include a heating element 24, which is at least partially located in the chamber 210, that is, the heating element 24 can be completely located in the chamber 210, or a part of the heating element 24 can be located in the chamber 210 and the other part can be located outside the chamber 210. In some examples, the heating element 24 does not contact the catalyst 22, and the heating element 24 is used to heat the gas in the chamber 210. In other examples, the heating element 24 contacts the catalyst 22 and is used to heat the catalyst 22 (for example, the example shown in FIG. 5). In other examples, the heating element 24 contacts part of the catalyst 22 and is used to heat the catalyst 22, and the other part does not contact the catalyst 22 and is used to heat the gas in the chamber 210.

[0110] The heating element 24 is arranged as a heat source to heat the catalyst 22 or the flue gas entering the chamber 210, increase the temperature of the chamber 210 or the temperature of the catalyst 22, and enhance the catalytic activity and catalytic capacity of the catalyst 22. In addition, the temperature rise can also increase the kinetic energy of the reactant molecules, making the reactants more easily activated, thereby increasing the reaction rate, and more combustible gases in the flue gas can be catalytically combusted, reducing the emission of combustible gases and reducing the risk of combustion and explosion.

[0111] In the example shown in FIG. 5, the heating element 24 is provided in multiple, and in other examples, the heating element 24 can be provided only one.

[0112] Referring to FIG. 5, each heating element 24 includes a resistance wire 241 and a plurality of fins 242, the resistance wire 241 and the plurality of fins 242 are both arranged in the cavity 210, the resistance wire 241 is fixed to the inner wall surface of the cavity 210 (the wall surface of the mounting shell 21 encloses the cavity 210), the plurality of fins 242 are fixedly connected with the resistance wire 241 (wherein, the fixedly connected in the present application refers to no relative movement between two structures, or the relative stillness of two structures, including the non-detachable connection of two structures, and also including the undetached state of the detachable connection of two structures), each fin 242 extends into the catalyst 22. In other examples, only one or a part of the fins 242 can extend into the catalyst 22, and the other part of the fins 242 does not extend into the catalyst 22, and the part of the fins 242 not extending into the catalyst 22 can be used to heat the gas in the cavity 210. In the example that the catalyst 22 is a supported catalyst, the heating element 24 can extend into the carrier 23 and be in contact with the carrier 23 and the catalyst 22 thereon, so as to heat the carrier 23 or the catalyst 22 inside the carrier 23, thereby enhancing the catalytic ability of the catalyst 22.

[0113] The plurality of fins 242 are arranged, the heat of the resistance wire 241 is conducted to the outer periphery of the resistance wire 241 through the fins 242, the heat diffusion range is expanded, the temperature of the gas around the heating element 24 and the catalyst 22 can be increased, and the rate of the catalytic reaction can be improved. Moreover, at least one fin 242 extends into the catalyst 22 (or extends into the carrier 23), the heating area of the catalyst 22 is increased, which is conducive to heating the catalyst 22, and further enhances the catalytic ability of the catalyst 22.

[0114] In the example shown in FIG. 5, the cavity 210 can extend along a first direction, the resistance wire 241 of each heating element 24 extends along the length direction of the cavity 210, and the plurality of fins 242 of each heating element 24 are spaced apart on the resistance wire 241 along the length direction of the resistance wire 241. In other examples, the cavity 210 can also extend in a meandering manner, a serpentine manner or a spiral manner, and in such examples, the resistance wire 241 of each heating element 24 can also extend along the length direction of the cavity 210.

[0115] FIG. 6 exemplarily shows the structure of another heating element 24 (FIG. 6 is a view of the first inlet 211), in this example, taking the cylindrical mounting shell 21 as an example, the resistance wire 241 of each heating element 24 is annular, and the plurality of fins 242 of each heating element 24 are arranged in an annular manner, wherein, the shaded part in FIG. 6 refers to the catalyst 22. In other examples, the mounting shell 21 can also be a quadrangular prism shell, and in such examples, the resistance wire 241 is square.

[0116] Fig. 7 exemplarily shows a structure of another heating element 24, in which example, the heating element 24 includes a resistance wire 241 (which may, in this example, not include the fins 242), and the resistance wire 241 extends in a serpentine (or "S" shape, or curved, or meandering) manner. In this example, the shaded portion in Fig. 7 refers to the catalyst 22, and the resistance wire 241 is in sufficient contact with the catalyst 22 by virtue of the serpentine extension of the resistance wire 241 to heat the catalyst 22.

[0117] In other examples, the heating element 24 can be an induction heating device that uses eddy current heat generated in a conductive material by an induced current to heat up; the heating element 24 can also be a device that converts energy of a laser beam into heat energy; the heating element 24 can also be a device that heats up by a gas, for example, the heating element 24 includes a heat pipe that extends into the chamber 210, and a hot gas flows through the heat pipe.

[0118] In examples in which the heating element 24 is provided, the heating element 24 can be coated with a peroxide or a solid oxygen (oxygen candle) at a portion of the heating element 24 that is located within the chamber 210. When the heating element 24 heats up, the peroxide or the solid oxygen on the heating element 24 decomposes to generate oxygen gas when the temperature of the peroxide or the solid oxygen increases, and the oxygen gas provides oxygen for the catalytic reaction, supports the normal progress of the catalytic reaction, and, by virtue of the additional oxygen supply, the rate of the catalytic reaction can be increased. In this regard, the peroxide can be at least one of CsO2, Na2O2, K2O2, CaO2.

[0119] Regarding the structure of the outlet 214, referring back to Fig. 4, in some examples, the outlet 214 can include a plurality of holes 2141 that are distributed in a matrix manner on the side wall of the mounting shell 21. Fig. 8 exemplarily shows another structure of the outlet 214, which can be understood as the same structure as the first inlet 211 exemplified in Fig. 4, that is, in this example, the outlet 214 is a port of the mounting shell 21, and, to prevent the catalyst 22 from leaking out of the outlet 214 to the outside of the mounting shell 21, a gas-permeable screen 28 can be provided at the outlet 214. In the example shown in Fig. 8, the screen 28 can also be a part of the mounting shell 21, and the outlet 214 includes a plurality of mesh holes on the screen 28.

[0120] Fig. 9 exemplarily shows another structure of the outlet 214, in which example, the outlet 214 is a round hole (or a square hole), and is provided on the side wall of the mounting shell 21, and a screen 28 is provided at the outlet 214 to prevent the catalyst 22 from leaking out. In the example shown in Fig. 9, the screen 28 can also be a part of the mounting shell 21, and the outlet 214 includes a plurality of mesh holes on the screen 28 that can communicate with the outside and the chamber 210.

[0121] In some examples, the smoke treatment device 2 further comprises a suction member 25 for filtering the gas, Fig. 10 exemplarily shows the internal structure of another smoke treatment device 2, referring to Fig. 10, the suction member 25 is arranged in the chamber 210, at least part of the suction member 25 is located downstream of the first inlet 211 (the arrow 211 in Fig. 10 exemplarily indicates the approximate position of the first inlet 211), in the example of Fig. 10, the suction member 25 is located downstream of the first inlet 211. In other examples, it is not excluded that the suction member 25 is arranged at a position other than downstream of the first inlet 211, and more suction members 25 are arranged to play a role of sufficient filtering. The catalyst 22 is located downstream of the suction member 25, and the outlet 214 (the arrow 214 in Fig. 10 exemplarily indicates the approximate position of the outlet 214) is located downstream of at least part of the catalyst 22, in the example of Fig. 10, the outlet 214 is located downstream of all the catalyst 22. In other examples, it is not excluded that the catalyst 22 is arranged at a position other than upstream of the outlet 214, and more catalysts 22 are arranged to play a role of sufficient catalysis.

[0122] In Fig. 10, two different shades respectively represent the suction member 25 and the catalyst 22, which can be seen in detail in the annotations in Fig. 10.

[0123] The suction member 25 has strong adsorption capacity, for example, the suction member 25 can be activated carbon, molecular sieve and other substances with strong adsorption capacity, which can filter the smoke. The suction member 25 is arranged downstream of the first inlet 211, and the catalyst 22 is located downstream of the suction member 25, so that the smoke discharged from the first pressure relief valve 12 will first pass through the suction member 25 before contacting the catalyst 22, the suction member 25 can adsorb solid particles (such as carbon powder particles, diaphragm fragments, electrode particles, etc.) and electrolyte droplets in the smoke, so that the filtered smoke contacts the catalyst 22, reducing the influence of solid particles and impurities on the catalytic reaction, and facilitating the stable progress of the catalytic reaction.

[0124] In some examples, the catalyst 22 and the adsorption member 25 can be separated to prevent them from moving freely, that is, the smoke treatment device 2 can further include a separation piece 26 arranged in the chamber 210, and the structure of the separation piece 26 is exemplarily shown in FIG. 11. Referring to FIGS. 10 and 11, the chamber 210 includes an adsorption chamber 2101 and a catalysis chamber 2102 located at different sides of the separation piece 26, the adsorption chamber 2101 is communicated with the first inlet 211 and internally arranged with the adsorption member 25, the catalysis chamber 2102 is communicated with the outlet 214 and internally arranged with the catalyst 22, the adsorption chamber 2101 is communicated with the catalysis chamber 2102, and the communication position of the adsorption chamber 2101 and the catalysis chamber 2102 is located upstream of the catalyst 22. For example, the separation piece 26 is provided with a plurality of through holes 261, wherein the through holes 261 can be circular holes, square holes, long strip-shaped holes or heterogeneous holes, etc., and the present application does not make specific limitation thereto, and the adsorption chamber 2101 is communicated with the catalysis chamber 2102 through the through holes 261. In other examples, the separation piece 26 can be a mesh structure with holes such as a screen.

[0125] The chamber 210 is divided into two sub-chambers by the separation piece 26, one of the sub-chambers is the adsorption chamber 2101 arranged with the adsorption member 25, and the other of the sub-chambers is the catalysis chamber 2102 arranged with the catalyst 22, after the smoke enters the chamber 210, it will first enter the adsorption chamber 2101, after the smoke is filtered by the adsorption member 25, it will enter the catalysis chamber 2102 through the through holes 261 of the separation piece 26, and react with the catalyst 22 in the catalysis chamber 2102, under the action of the catalyst 22, the smoke is oxidized and combusted to produce water and carbon dioxide, and then discharged from the outlet 214. The separation piece 26 reduces the possibility of the adsorption member 25 and the catalyst 22 moving freely, so that they do not interfere with and affect each other.

[0126] Referring to FIGS. 10 and 11, in the example that the smoke treatment device 2 includes the heat generating member 24, the heat generating member 24 can be arranged in the catalysis chamber 2102. In other examples, the heat generating member 24 can be partially located outside the mounting shell 21 and partially extend into the catalysis chamber 2102. In other examples, the heat generating member 24 can be partially located in the adsorption chamber 2101 and partially extend into the catalysis chamber 2102.

[0127] In addition, the mounting shell 21 can also have any suitable structure. For example, in the example shown in FIG. 11, the mounting shell 21 is distributed along the first direction with the first battery shell 11, the mounting shell 21 extends along the first direction away from the side of the first battery shell 11, that is, the mounting shell 21 has a structure similar to a straight pipe, the mounting shell 21 is provided with the first inlet 211 at one end close to the first battery shell 11, and is provided with the outlet 214 at one end away from the first battery shell 11, and the partition 26 is located between the first inlet 211 and the outlet 214. Referring to FIG. 10, the catalyst 22 is arranged on the side of the partition 26 facing the outlet 214, and the adsorption member 25 is arranged on the side of the partition 26 facing the first inlet 211.

[0128] FIG. 12 shows the internal structure of another example of the flue gas treatment device 2. In this example, the mounting shell 21 is distributed along the first direction with the first battery 1, the cross section of the chamber 210 perpendicular to the first direction is spiral-shaped, for example, the cross section of the chamber 210 in the area enclosed by the dashed line frame D1 in FIG. 12 is spiral-shaped, and the cross section of the chamber 210 in the area enclosed by the dashed line frame D2 in FIG. 12 is zigzag-shaped. In other examples, the cross section of the chamber 210 perpendicular to the first direction is at least partially curved (S-shaped or serpentine). The difference between the zigzag-shaped and the curved is whether there is a clear corner, for example, the part of the cross section of the chamber 210 in the area enclosed by the dashed line frame D2 in FIG. 12 has a clear corner (for example, a right angle, or an acute angle, or an obtuse angle), and this part is zigzag-shaped, and if it is an arc transition similar to a serpentine or S-shaped, it is curved.

[0129] In other examples, the cross section of the chamber 210 perpendicular to the first direction can be completely spiral-shaped, completely serpentine, completely S-shaped, or completely irregular.

[0130] In order to make the energy storage cabinet 100 or the battery pack 200 more beautiful, in the example shown in FIG. 12, the size of the mounting shell 21 in the second direction can be equal to the size of the first battery 1 in the second direction, and the size of the mounting shell 21 in the third direction can be equal to the size of the first battery 1 in the third direction, wherein the first direction, the second direction, and the third direction are perpendicular to each other. In one example, the second direction can be the vertical direction, and the first direction and the third direction are two mutually perpendicular horizontal directions.

[0131] In this way, the cross section of the chamber 210 perpendicular to the second direction is at least partially spiral-shaped, zigzag-shaped, or curved, which can lengthen the length of the chamber 210 in the mounting shell 21, so that more catalysts 22 and adsorption members 25 can be arranged in the chamber 210. In addition, the chamber 210 does not extend towards the first direction, which reduces the thickness of the mounting shell 21, and at the same time lengthens the chamber 210, reduces the space occupied by the mounting shell 21 in the first direction.

[0132] Referring to FIG. 12, in the example in which the flue gas treatment device 2 includes the partition 26, the partition 26 can be disposed within the chamber 210 of FIG. 12 and separate the chamber 210 into the catalysis chamber 2102 and the adsorption chamber 2101. In addition, a screen 28 can also be additionally provided downstream of the catalyst 22 to prevent the catalyst 22 from leaking from the outlet 214.

[0133] In some examples, the energy storage cabinet 100 can include a plurality of battery packs 200, and FIG. 13 exemplarily shows a schematic diagram of the overall structure of another energy storage cabinet 100, each battery pack 200 including a first battery 1 and a flue gas treatment device 2. The plurality of first batteries 1 are fixedly connected, and the plurality of flue gas treatment devices 2 can be the same structure or different structures. The flue gas treatment device 2 in FIG. 13 is described by taking the flue gas treatment device 2 in FIG. 1 as an example, and the flue gas treatment principles of the plurality of flue gas treatment devices 2 are the same, which will not be described herein again.

[0134] The plurality of battery packs 200 can be distributed along any suitable direction. For example, in the example shown in FIG. 13, the first batteries 1 and the flue gas treatment devices 2 are distributed along a first direction, and the plurality of battery packs 200 are distributed along a second direction (for example, a vertical direction), and the first direction is perpendicular to the second direction. In other examples, the plurality of battery packs 200 can be distributed along a third direction (for example, a horizontal direction).

[0135] In some examples, the plurality of batteries can share one flue gas treatment device 2. FIG. 14 exemplarily shows a structure of another flue gas treatment device 2, and the energy storage cabinet 100 further includes a second battery 4. The first battery 1 and the second battery 4 are distributed along a second direction, and the flue gas treatment device 2 extends along the second direction. In other examples, the first battery 1 and the second battery 4 can be distributed along a third direction, and the flue gas treatment device 2 extends along the third direction. The second battery 4 can share the same battery manager 300 as the first battery 1; the battery manager 300 can also be provided in plurality, and the second battery 4 and the first battery 1 are electrically connected to the respective corresponding battery managers 300.

[0136] FIG. 15 exemplarily shows a schematic diagram of an internal structure of the flue gas treatment device 2 in FIG. 14. Referring to FIGS. 14 and 15, the second battery 4 includes a second battery shell 41 and a second pressure relief valve 42 (or referred to as a second explosion-proof valve), and a plurality of battery cells 13 are also provided in the second battery shell 41. The second battery shell 41 is distributed along the second direction with the first battery shell 11, and the mounting shell 21 is distributed along the first direction with the first battery shell 11. The second pressure relief valve 42 is provided on the side of the second battery shell 41 facing the mounting shell 21. The structure of the second pressure relief valve 42 can be the same as that of the first pressure relief valve 12, or can be different, as long as it can balance the pressure in the second battery shell 41.

[0137] It can be understood that when the second battery 4 is in thermal runaway, the smoke in the second battery 4 can be discharged through the second pressure relief valve 42, and the mounting shell 21 further comprises a second inlet 212 in communication with the adsorption cavity 2101, the first inlet 211 and the second inlet 212 are spaced apart in the second direction, the second inlet 212 is in sealing connection with the second pressure relief valve 42, for example, the second inlet 212 and the second pressure relief valve 42 are oppositely arranged in position, and a sealing structure (for example, a sealing ring 3) is arranged between the second inlet 212 and the second pressure relief valve 42.

[0138] Regarding the cooperation structure between the second pressure relief valve 42 and the second inlet 212, in the example shown in FIG. 15, the second pressure relief valve 42 protrudes to the outside of the second battery shell 41 and at least partially extends into the second inlet 212. In some other examples, the second pressure relief valve 42 extends into the cavity 210 through the second inlet 212. In some other examples, the second pressure relief valve 42 is only opposite or towards the second inlet 212, without extending into the second inlet 212 and the cavity 210. The second inlet 212 is oppositely arranged with the second pressure relief valve 42, that is, the second pressure relief valve 42 in the open state allows the smoke in the second battery 4 to be sprayed into the cavity 210 through the second inlet 212, and it can also be understood that when the second pressure relief valve 42 is opened, the internal space of the second battery 4 is in communication with the cavity 210.

[0139] The shape and structure of the second inlet 212 can be the same as or different from the first inlet 211, and the present application does not make specific limitations thereto. In addition, the connection between the second inlet 212 and the second pressure relief valve 42 can also adopt a sealing connection design, for example, a sealing ring 3, sealing welding or sealing bonding, etc.

[0140] FIG. 16 shows the arrangement of the adsorption member 25 and the catalyst 22 in the example shown in FIG. 15, at least part of the adsorption member 25 is located downstream of the second inlet 212, that is, the adsorption member 25 is arranged downstream of the first inlet 211 and downstream of the second inlet 212, in the example shown in FIG. 15, the second inlet 212 is located downstream of the first inlet 211, and the adsorption member 25 is arranged between the first inlet 211 and the second inlet 212 and downstream of the second inlet 212. It can be understood that the adsorption member 25 can be arranged at other positions downstream of the first inlet 211 and other positions downstream of the second inlet 212.

[0141] Referring back to FIG. 14 and FIG. 15, the energy storage cabinet 100 further comprises a third battery 5, the first battery 1, the second battery 4 and the third battery 5 can be distributed along the second direction, and the three batteries are fixedly connected. In order to match the third battery 5, the third inlet 213 can also be arranged on the mounting shell 21, the third inlet 213 is arranged opposite to the pressure relief valve (not labeled in the figure) of the third battery 5 and is sealingly connected, when the third battery 5 is thermal runaway, the flue gas of the third battery 5 will enter the adsorption cavity 2101 through the third inlet 213. In this example, at least part of the adsorption member 25 is arranged downstream of the third inlet 213.

[0142] In an example, referring to FIG. 15 and FIG. 16, the adsorption cavity 2101 and the catalytic cavity 2102 can both extend along the second direction, and the size of the adsorption cavity 2101 in the second direction and the size of the catalytic cavity 2102 in the second direction are both greater than the size of the first battery shell 11 in the second direction. The position where the adsorption cavity 2101 communicates with the catalytic cavity 2102 and the outlet 214 are respectively located at different ends of the catalyst 22 in the second direction, for example, the position where the adsorption cavity 2101 communicates with the catalytic cavity 2102 can be located below the catalyst 22, and the outlet 214 can be located above the catalyst 22; for another example, the position where the adsorption cavity 2101 communicates with the catalytic cavity 2102 can be located above the catalyst 22, and the outlet 214 can be located below the catalyst 22.

[0143] Regarding the position where the adsorption cavity 2101 communicates with the catalytic cavity 2102, referring to FIG. 15 and FIG. 16, the partition 26 is a partition plate, a plurality of through holes 261 (in other examples, the through hole 261 can also be one) are arranged on the partition 26, the adsorption cavity 2101 communicates with the catalytic cavity 2102 through the plurality of through holes 261, and the plurality of through holes 261 are located upstream (for example, the bottom) of the catalyst 22, and the outlet 214 can be located downstream (for example, the top) of the catalyst 22.

[0144] FIG. 17 exemplarily shows the internal structure of another flue gas treatment device 2, the partition 26 is a partition plate, and a gap 262 is formed between the end (the bottom end in FIG. 17) of the partition 26 and the part of the inner wall surface of the cavity 210 that is opposite to the end, for example, the area of the dashed line box D3 in FIG. 17, and the adsorption cavity 2101 and the catalytic cavity 2102 communicate through the gap 262.

[0145] In the example where the adsorption cavity 2101 and the catalytic cavity 2102 communicate through the gap 262 (similar to the gap 262 shown in FIG. 17), a barrier net 28 (not shown in FIG. 17) can be additionally arranged to limit the adsorption member 25, wherein the barrier net 28 can be arranged at the gap 262 or upstream of the gap 262, thereby reducing the possibility of the adsorption member 25 entering the catalytic cavity 2102 from the gap 262.

[0146] When multiple batteries share one smoke treatment device 2, when thermal runaway occurs in any one of the multiple batteries (the first battery 1, the second battery 4, or the third battery 5), smoke will enter the adsorption cavity 2101 of the installation shell 21 from the corresponding inlet (the first inlet 211, the second inlet 212, or the third inlet 213), and the downstream of the first inlet 211, the second inlet 212, and the third inlet 213 are all provided with adsorption members 25, so no matter which battery experiences thermal runaway, the smoke discharged by the battery can be adsorbed by the adsorption members 25, and then catalytically combusted by the catalyst 22 before being discharged from the outlet 214. The number of smoke treatment devices 2 is reduced, and the installation of the smoke treatment device 2 is facilitated.

[0147] In some examples, referring to FIGS. 15 and 16, when a battery (the first battery 1, the second battery 4, or the third battery 5) experiences thermal runaway and generates a large amount of smoke, the size of the region in the second direction in which the catalyst 22 is arranged in the catalytic cavity 2102 is greater than the size of the first battery shell 11 in the second direction, so that the region in which the catalyst 22 is arranged in the catalytic cavity 2102 is longer. This can increase the amount of catalyst 22, and more catalyst 22 in the catalytic cavity 2102 can react with the smoke, so that the catalytic capacity of the smoke treatment device 2 is stronger, the gas production requirements of the battery are met, the possibility of a large amount of flammable gas being discharged from the installation shell 21 and accumulating in the external space is reduced, and the risk of combustion and explosion of flammable gas is reduced.

[0148] In examples in which the smoke treatment device 2 is shared, the adsorption cavity 2101 and the catalytic cavity 2102 can be arranged in any suitable direction. For example, referring to FIGS. 15 to 17, the catalytic cavity 2102 and the adsorption cavity 2101 are distributed along the first direction, and the catalytic cavity 2102 is located on the side of the adsorption cavity 2101 away from the first battery shell 11. For another example, FIG. 18 shows another example of the internal structure of a smoke treatment device 2. In the example shown in FIG. 18, the catalytic cavity 2102 and the adsorption cavity 2101 are distributed along the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0149] In addition, in examples in which the smoke treatment device 2 is shared, the outlet 214 can be located downstream of all the catalysts 22 in the cavity 210, or downstream of at least part of the catalysts 22, as long as the smoke can be catalytically combusted by the catalysts 22 before being discharged from the outlet 214. In addition, the outlet 214 can also be arranged at any suitable position. For example, in the example shown in FIG. 15, the outlet 214 is located on the side of the installation shell 21 away from the first battery shell 11. For another example, in the example shown in FIG. 18, the outlet 214 is located on the side wall of the installation shell 21 in the third direction and communicates with the catalytic cavity 2102.

[0150] Figure 19 shows the internal structure of another flue gas treatment device 2, in which example, a plurality of cells (e.g. the first cell 1, the second cell 4 and the third cell 5) share one flue gas treatment device 2, the mounting shell 21 is distributed along a first direction with the first cell 1, and the cross section of the chamber 210 perpendicular to the first direction is at least partially spiral. In this example, the adsorption member 25 is filled in the adsorption chamber 2101, and the partition 26 is arranged downstream of a plurality of inlets (e.g. the first inlet 211, the second inlet 212 and the third inlet 213) so that there is an adsorption member 25 downstream of each inlet. The partition 26 can be a mesh structure provided with a plurality of holes, one end of the catalytic chamber 2102 communicates with the adsorption chamber 2101 through the plurality of holes on the partition 26, and the other end communicates with the outlet 214, and the catalyst 22 is filled in the catalytic chamber 2102.

[0151] Figure 20 shows the overall structure of another energy storage cabinet 100, and Figure 21 shows the internal structure of the flue gas treatment device 2 in Figure 20. Referring to Figures 20 and 21, the first cell 1, the second cell 4 and the third cell 5 are distributed along a second direction, the first pressure relief valve 12 is located on one side of the first cell shell 11 in the first direction, and the mounting shell 21 includes a first portion 215 and a second portion 216 which are in internal communication, wherein the internal space of the first portion 215 and the second portion 216 constitutes the chamber 210.

[0152] Referring to Figures 20 and 21, the first portion 215 is located on one side of the first cell shell 11 in the first direction, the first inlet 211, the second inlet 212 and the third inlet 213 are arranged in the first portion 215, and the adsorption member 25 is arranged in the first portion 215 in the case of being provided with the adsorption member 25, in this example, the space inside the first portion 215 can be understood as the adsorption chamber 2101. The second portion 216 is located on one side of the first cell shell 11 in the second direction, for example, the third cell 5 is located below the first cell 1 and the second cell 4, and the second portion 216 is located below the third cell 5. The outlet 214 is arranged at any suitable position of the second portion 216, and the catalyst 22 is arranged in the second portion 216, in this example, the space inside the second portion 216 can be understood as the catalytic chamber 2102, and the catalytic chamber 2102 communicates with the adsorption chamber 2101.

[0153] In the example shown in FIGS. 20 and 21, the second portion 216 can be a complete space or a winding channel, such as a serpentine channel, an "S" shaped channel, or a "Z" shaped channel, and the present application does not make a specific limitation thereon. In addition, the size of the second portion 216 in the first direction can be equal to the size of the first battery shell 11 in the first direction, and the size of the second portion 216 in the third direction can be equal to the size of the first battery shell 11 in the third direction. The communication between the first portion 215 and the second portion 216 can be provided with a partition 26 to reduce the possibility of the catalyst 22 or the adsorption member 25 moving randomly.

[0154] In addition, referring to FIGS. 20 and 21, the size of the first portion 215 in the third direction can be smaller than the size of the first battery shell 11 in the third direction, so that the size of the first portion 215 can be reduced, and the first portion 215 can be in a tubular structure to achieve the function of guiding, and the smoke of thermal runaway can be introduced into the second portion 216, which improves the aesthetics of the energy storage cabinet 100 and reduces the space occupied by the first portion 215.

[0155] In other examples, the first battery 1 is located above the third battery 5 and the second battery 4, and the second portion 216 is located above the first battery 1.

[0156] In other examples, the energy storage cabinet 100 can only include one battery, for example, the first battery 1, the first portion 215 is arranged at the side of the first battery 1, and the second portion 216 is arranged below the first battery 1, and the catalyst 22 is arranged in the second portion 216. In other examples, the first portion 215 is arranged at the side of the first battery 1, and the second portion 216 is arranged above the first battery 1, and the catalyst 22 is arranged in the second portion 216.

[0157] FIG. 22 exemplarily shows the overall structure of another energy storage cabinet 100, for example, an energy storage container, which further includes a cabinet body 6 (or a box body), the first battery 1 and the second battery 4 are arranged in the cabinet body 6, and a mounting shell 21 is partially arranged in the cabinet body 6 and connected to the first battery shell 11 (the shell of the first battery 1) and the second battery shell 41 (the shell of the second battery 4), and the other part of the mounting shell 21 extends out of the cabinet body 6. In other examples, the mounting shell 21 can also be entirely arranged in the cabinet body 6.

[0158] In the example shown in FIG. 22, a cluster (which can be understood as a column in FIG. 22) of batteries shares one flue gas treatment device 2. The plurality of batteries in the cluster (including the first battery 1 and the second battery 4) are all in communication with the mounting shell 21, and the communication structure can refer to the communication structure in the previous examples of the present application, for example, corresponding inlets are provided on the mounting shell 21, and the present application will not be described again. The mounting shell 21 extends from the top of the cabinet 6 to the outside of the cabinet 6, and the suction member 25 can be provided in the part of the mounting shell 21 located in the cabinet 6, the catalyst 22 can be provided in the part of the mounting shell 21 located outside the cabinet 6, and the outlet 214 is provided outside the cabinet 6.

[0159] In other examples, the mounting shell 21 can also be entirely provided in the cabinet 6, and the outlet 214 is in communication with the outside through the opening on the cabinet 6.

[0160] FIG. 23 exemplarily shows the structure of a plurality of clusters of batteries sharing one flue gas treatment device 2, wherein the cabinet 6 in FIG. 23 is represented by a solid virtual line frame. Among them, the flue gas treatment device 2 further comprises a first fan 27, and the heating element 24 is a gas heater for heating gas. FIG. 24 exemplarily shows the structure of the first fan 27. Referring to FIGS. 23 and 24, the first fan 27 is provided outside the cabinet 6 and is in communication with the part of the mounting shell 21 located outside the cabinet 6, wherein the first fan 27 is provided outside the cabinet 6, which facilitates the suction of air outside the cabinet 6 into the chamber 210. In addition, the first fan 27 can be provided downstream of the suction member 25.

[0161] Referring to FIG. 24, the heating element 24 is located in the chamber 210 and is provided downstream of the first fan 27, and the catalyst 22 is provided downstream of the heating element 24. The heating element 24 and the catalyst 22 are both provided in the part of the mounting shell 21 located outside the cabinet 6, that is, the catalyst 22 and the heating element 24 are both provided outside the cabinet 6, which reduces the influence of heat during the catalytic process on the temperature in the cabinet 6, so that the thermal runaway will not spread in the cabinet 6. The outlet 214 is provided downstream of the catalyst 22 and outside the cabinet 6, which facilitates the direct discharge of the catalyzed flue gas to the outside of the cabinet 6.

[0162] The flue gas production after the thermal runaway of the system-level energy storage device such as the energy storage cabinet 100 / energy storage box is large, and the first fan 27 (or referred to as a gas pump, a wind pump) can be used to provide air to the catalyst 22, thereby providing the required oxygen for the catalytic reaction. In addition, the heating element 24 can also be provided to heat the gas blown by the first fan 27, so as to achieve the improvement of the catalytic reaction rate.

[0163] In other examples, the first fan 27 can also be provided in other energy storage cabinets 100, for example, the first fan 27 can be provided in the energy storage cabinet 100 shown in FIG. 1; for another example, the first fan 27 can also be provided in the energy storage cabinet 100 shown in FIG. 14. That is, the first fan 27 is not limited to the system-level energy storage cabinet 100.

[0164] In the example in which multiple clusters of batteries share one flue gas treatment device 2, in addition to the cluster of batteries in which the first battery 1 and the second battery 4 are located, other clusters of batteries can also be in communication with the mounting shell 21, referring to FIGS. 23 and 24, in this example, the mounting shell 21 can include one main pipe and multiple branch pipes, each branch pipe extends into the cabinet body 6 and is in communication with a corresponding cluster of batteries, each branch pipe is filled with the adsorption member 25, the main pipe is located outside the cabinet body 6, and the main pipe is filled with the catalyst 22, the heating element 24 and the first fan 27 can be provided upstream of the catalyst 22.

[0165] In some examples, taking the energy storage cabinet 100 shown in FIG. 24 as an example, the flue gas treatment device 2 can also include a flame arrester 29 provided at the outlet 214, the flame arrester 29 includes multiple passages 291 for dividing the flame, and the multiple passages 291 are in communication with the chamber 210 (for example, in communication with the catalytic chamber 2102). By providing the flame arrester 29 at the outlet 214, the flame arrester 29 will divide the large-area flame into many small flames before the flame is ejected from the outlet 214, thereby increasing the speed of heat dissipation, and the concentration of combustible gas and the oxygen content in the passages 291 will be reduced due to diffusion, which is not sufficient to maintain the combustion of the flame. In addition, the flame will collide with the wall of the passage 291 when passing through the passage 291, thereby further reducing the speed and intensity of the flame, and under a series of actions, the flame is gradually extinguished in the flame arrester 29, thereby reducing the possibility of flame spread.

[0166] In other examples, the flame arrester 29 can also be provided in other energy storage cabinets 100, for example, the flame arrester 29 can be provided in the energy storage cabinet 100 shown in FIG. 1; for another example, the flame arrester 29 can also be provided in the energy storage cabinet 100 shown in FIG. 14. That is, the use of the flame arrester 29 is not limited to the system-level energy storage cabinet 100.

[0167] When the first battery 1 generates a large amount of smoke after thermal runaway, the smoke is oxidized and combusted under the action of the catalyst 22, which generates a large amount of heat, affecting the first battery 1 or other equipment around the installation shell 21. In some examples, the energy storage cabinet 100 can also include a cooling assembly. Any form of energy storage cabinet 100 can be provided with the above-mentioned cooling assembly, and the cooling assembly can be used to cool the entire installation shell 21, or can be used to cool a local position of the installation shell 21 (for example, the part of the installation shell 21 provided with the catalyst 22 is cooled). The use of the cooling assembly to cool the installation shell 21 (air cooling or liquid cooling) can control the temperature and reaction rate of the catalytic reaction, reduce the possibility of reaction runaway, and also reduce the impact of the installation shell 21 on surrounding equipment or personnel due to high temperature.

[0168] For example, the energy storage cabinet 100 shown in FIG. 23 is provided with a liquid cooling assembly, which includes a liquid cooling plate 72 and a liquid cooling pump. The liquid cooling plate 72 contacts the part of the installation shell 21 provided with the catalyst 22 (i.e., the part of the installation shell 21 outside the cabinet body 6 provided with the catalyst 22), and the liquid cooling pump can be arranged inside or outside the cabinet body 6, and the liquid cooling pump is used to provide cooling liquid (for example, water) for the liquid cooling plate 72.

[0169] In other examples, the cooling assembly is an air cooling assembly, and the structure of the air cooling assembly is shown in FIG. 25. The cooling assembly includes a second fan 71, which is arranged outside the installation shell 21 and fixedly connected with the installation shell 21. For example, the installation shell 21 is fixed with the cabinet body 6, and the second fan 71 is arranged outside the cabinet body 6 and fixedly connected with the cabinet body 6 (the second fan 71 is fixedly connected with the installation shell 21 through the cabinet body 6), and the air outlet of the second fan 71 faces the installation shell 21 to blow and cool the part of the installation shell 21 provided with the catalyst 22.

[0170] In other examples, the cooling assembly can also be arranged in other energy storage cabinets 100. For example, the cooling assembly can be arranged in the energy storage cabinet 100 shown in FIG. 1. For another example, the cooling assembly can also be arranged in the energy storage cabinet 100 shown in FIG. 14. That is, the arrangement of the cooling assembly is not limited to the system-level energy storage cabinet 100.

[0171] In other examples, the installation shell 21 includes a hard structure and a soft structure. The hard structure can be a structure made of plastic, metal or the like for protection or support. The soft structure can be a hose, one end of which is in communication with the hard structure, and the other end is arranged opposite the corresponding inlet (for example, the first inlet 211) to enable the battery (for example, the first battery 1) and the installation shell 21 to communicate, so that the smoke after the battery thermal runaway can enter the installation shell 21.

[0172] In other examples, the installation shell 21 comprises a protection structure and a through structure, the protection structure can be a structure for protection or for support, and the through structure can be a soft or hard pipe such as a rubber pipe, a metal pipe, etc., one end of the through structure is in communication with the protection structure, and the other end is arranged opposite to the corresponding inlet (for example, the first inlet 211) to enable the battery (for example, the first battery 1) and the installation shell 21 to be in communication, so that the flue gas after thermal runaway of the battery can enter the installation shell 21.

[0173] In other examples, a mesh structure that can block the leakage of the suction accessory 25 can also be arranged at the first inlet 211, and the mesh structure can be a structure that does not affect the cooperation with the first pressure relief valve 12 and does not affect the flue gas entering the installation shell 21.

[0174] In addition, the upstream and downstream of the present application can be determined according to the flow path of the flue gas, or can be determined with the aid of the following methods, for example, the flue gas enters from the first inlet 211 and is discharged from the outlet 214, so the first inlet 211 is located upstream of the outlet 214; other positions on the path from the first inlet 211 to the outlet 214 are located downstream of the first inlet 211, for example, the second inlet 212 is located downstream of the first inlet 211 because the flue gas passes through the second inlet 212 during the discharging process from the outlet 214; the suction accessory 25 is located upstream of the catalyst 22 because the flue gas passes through the suction accessory 25 before passing through the catalyst 22 in the flow path of the flue gas in the chamber 210.

[0175] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A battery pack with flue gas treatment function, characterized in that, Includes a first battery and a flue gas treatment device; The first battery includes a first battery casing, a first pressure relief valve, and a plurality of battery cells. The first pressure relief valve is disposed on the first battery casing and is used to release gas inside the first battery casing. The plurality of battery cells are disposed inside the first battery casing. The flue gas treatment device includes a mounting shell and a catalyst. The mounting shell is fixed on the first battery shell. The mounting shell includes a chamber and a first inlet and an outlet communicating with the chamber. The first inlet is sealed to the first pressure relief valve. The catalyst is disposed in the chamber and is used for catalytic combustion.

2. The battery pack according to claim 1, characterized in that, The flue gas treatment device further includes a heating element, which is at least partially located within the chamber. The heating element is used to heat the gas in the chamber, or the heating element contacts the catalyst and is used to heat the catalyst.

3. The battery pack according to claim 2, characterized in that, The heating element includes a resistance wire and multiple fins. The resistance wire and multiple fins are both disposed in the chamber. The resistance wire is fixed to the inner wall of the chamber. The multiple fins are fixedly connected to the resistance wire. At least one of the multiple fins extends into the catalyst.

4. The battery pack according to claim 2 or 3, characterized in that, The portion of the heating element located within the cavity is coated with peroxide or solid oxygen.

5. The battery pack according to any one of claims 2-4, characterized in that, The flue gas treatment device further includes a carrier disposed in the chamber, the carrier carrying the catalyst, and the heating element extending into the carrier.

6. The battery pack according to any one of claims 1-5, characterized in that, The catalyst is a metal catalyst, or the catalyst is a metal oxide catalyst.

7. The battery pack according to any one of claims 1-6, characterized in that, The flue gas treatment device further includes an adsorbent for filtering gas, the adsorbent being disposed in the chamber, at least a portion of the adsorbent being located downstream of the first inlet, the catalyst being located downstream of the adsorbent, and the outlet being located downstream of at least a portion of the catalyst.

8. The battery pack according to claim 7, characterized in that, The flue gas treatment device further includes a partition disposed in the chamber. The chamber includes an adsorption chamber and a catalytic chamber located on different sides of the partition. The adsorption chamber is connected to the first inlet and the adsorption element is disposed inside it. The catalytic chamber is connected to the outlet and the catalyst is disposed inside it. The adsorption chamber and the catalytic chamber are connected and the connection position is located upstream of the catalyst.

9. The battery pack according to claim 8, characterized in that, The separator is provided with a through hole, and the adsorption chamber is connected to the catalytic chamber through the through hole; or... There is a gap between the end of the separator and the portion of the inner wall of the chamber facing the end, and the adsorption chamber and the catalytic chamber are connected through the gap.

10. The battery pack according to any one of claims 1-9, characterized in that, The flue gas treatment device further includes a first fan, which is connected to the mounting housing and used to blow air into the chamber, and the catalyst is disposed downstream of the first fan.

11. The battery pack according to any one of claims 1-10, characterized in that, The mounting shell and the first battery shell are distributed along a first direction, and the cross-section of the chamber perpendicular to the first direction is at least partially spiral, bent, or curved.

12. The battery pack according to any one of claims 1-10, characterized in that, The first pressure relief valve is located on one side of the first battery housing in a first direction. The mounting housing includes a first part and a second part with internal space communication. The first part is located on one side of the first battery housing in the first direction. The first inlet is located in the first part. The second part is located on one side of the first battery housing in a second direction. The outlet is located in the second part. The catalyst is located in the second part. The second direction is perpendicular to the first direction.

13. The battery pack according to any one of claims 1-12, characterized in that, The flue gas treatment device further includes a flame arrester disposed at the outlet, the flame arrester including multiple channels for dividing the flame, the multiple channels communicating with the chamber.

14. The battery pack according to any one of claims 1-13, characterized in that, The battery pack also includes a cooling assembly. The cooling assembly includes a second fan, which is disposed outside the mounting housing, with its outlet facing the mounting housing; or... The cooling assembly includes a liquid cooling plate that contacts the mounting housing.

15. An energy storage cabinet, characterized in that, The battery pack includes a battery manager and any one of claims 1-14, wherein the battery manager is electrically connected to at least a portion of the plurality of battery cells.

16. The energy storage cabinet according to claim 15, characterized in that, The energy storage cabinet also includes a second battery, which includes a second battery housing and a second pressure relief valve. The second battery housing and the first battery housing are distributed along a second direction, and the mounting housing and the first battery housing are distributed along a first direction. The first direction is perpendicular to the second direction, and the second pressure relief valve is located on the side of the second battery housing facing the mounting housing. The mounting housing also includes a second inlet communicating with the adsorption chamber. The first inlet and the second inlet are arranged along the second direction. The second inlet is sealed to the second pressure relief valve. At least a portion of the adsorption element is located downstream of the second inlet.

17. The energy storage cabinet according to claim 15 or 16, characterized in that, The energy storage cabinet also includes a cabinet body, the first battery is disposed in the cabinet body, a portion of the mounting shell is located in the cabinet body and connected to the first battery shell, another portion of the mounting shell extends out of the cabinet body, and the catalyst is disposed in the portion of the mounting shell located outside the cabinet body.

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