Fume treatment device, battery, and energy storage system

Abstract

A fume treatment device (100), a battery, and an energy storage system. The fume treatment device (100) comprises: a gas chamber (10), a gas supply structure (20) in communication with the gas chamber (10), and a fume intake pipe (30), wherein one end of the fume intake pipe (30) is in communication with the gas chamber (10), the fume intake pipe (30) is configured to allow fumes to enter the gas chamber (10), the fume intake pipe (30) is provided with a sensor (31), the sensor (31) is configured to send a signal to the gas supply structure (20), and the fume intake pipe (30) is further provided with a delay structure (32) located between the sensor (31) and the gas chamber (10); and the gas supply structure (20) is configured to receive the signal and supply an inert gas to the gas chamber (10), and the delay structure (32) is configured to delay the opening of the fume intake pipe (30), such that the time when the fumes enter the gas chamber (10) is later than the time when the inert gas enters the gas chamber (10). In the fume treatment device (100), by means of the configurations of the delay structure (32) and the gas supply structure (20), when the fumes enter the gas chamber (10), the content of oxygen in the gas chamber (10) is relatively low, thereby reducing the risk of fume combustion and explosion.

Description

Flue gas treatment devices, batteries and energy storage systems

[0001] This application claims priority to the Chinese patent application filed with the Patent Office of China on March 18, 2024, with application number 202420513460.3, and invention name “Flue gas treatment device, battery and energy storage system”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of energy storage technology, and in particular relates to a flue gas treatment device, a battery, and an energy storage system. Background Art

[0003] With the development of strategic resources and heavy industries such as big data and nuclear power, large-scale energy storage devices can serve as backup power sources to solve the problem of power outages for important equipment. At the same time, with the development of the photovoltaic and wind power industries, large-scale energy storage devices can solve the problems of off-grid photovoltaic energy storage and wind power energy storage, as well as solve the problems of active power quality optimization and reactive power compensation in photovoltaic power stations. The market demand for energy storage is increasing, and the development of large-scale energy storage is becoming more and more rapid.

[0004] In current energy storage systems, there is still a high risk of combustion and explosion after the smoke generated by thermal runaway of the battery is discharged into the air, posing a high safety risk.

[0005] Summary of the Invention

[0006] In view of the above problems, the present application provides a flue gas treatment device, a battery and an energy storage system, which can reduce the risk of combustion and explosion of flue gas generated by battery thermal runaway being discharged into the air.

[0007] In a first aspect, some embodiments of the present application provide a flue gas treatment device, comprising:

[0008] Gas chamber;

[0009] an air supply structure, connected to the air chamber; and

[0010] An air intake pipe, one end of which is connected to the air bin, is used to supply smoke into the air bin. A sensor is provided on the air intake pipe, which is used to send a signal to the air supply structure. A delay structure is also provided on the air intake pipe between the sensor and the air bin;

[0011] The gas supply structure is used to receive signals and provide inert gas to the gas warehouse, and the delay structure is used to delay opening of the air inlet pipe so that the time when the smoke enters the gas warehouse is later than the time when the inert gas enters the gas warehouse.

[0012] In the technical solution of this embodiment, a gas bin is provided to collect the flue gas generated by thermal runaway of the battery, and an air intake pipe is provided to allow the flue gas to enter the gas bin through the air intake pipe. A sensor and a delay structure are provided on the air intake pipe. After the flue gas enters the air intake pipe, the sensor can send a signal to the gas supply structure so that the gas supply structure first provides inert gas to the gas bin to reduce the oxygen content in the gas bin. At the same time, the delay structure can block the flue gas to delay the time for the flue gas to enter the gas bin, and provide time for the gas supply structure to reduce the oxygen content in the gas bin. Through the setting of the delay structure and the gas supply structure, the oxygen content in the gas bin is low when the flue gas enters the gas bin, thereby reducing the risk of flue gas combustion and explosion.

[0013] In some embodiments, the time delay structure includes a pressure relief valve.

[0014] In the technical solution of this embodiment, the delay structure includes a pressure relief valve to utilize the minimum opening pressure of the pressure relief valve to achieve a delay effect. Specifically, before the flue gas pressure in the air intake pipe reaches the minimum opening pressure of the pressure relief valve, the delay structure will close the air intake pipe to block the flue gas from entering the gas bin, so that the inert gas can enter the gas bin in advance, thereby reducing the risk of combustion and explosion after the flue gas enters the gas bin.

[0015] In some embodiments, the delay structure includes a housing, an air flow cavity is provided in the housing, and an air inlet end and an air outlet end are connected to the air flow cavity, and the air inlet end and the air outlet end are both connected to the air inlet pipe;

[0016] The delay structure also includes an elastic member connected to the shell, one end of the elastic member is connected to a sealing member, and the elastic member is used to push the sealing member to seal the air inlet end.

[0017] The technical solution of this embodiment provides some specific structures when the delay structure is a pressure relief valve. The air intake pipe is closed by an elastic member and a sealing member. Before the flue gas pressure in the air intake pipe is lower than the minimum opening pressure, the flue gas pressure is not easy to deform the elastic member and drive the sealing member to move. At this time, the air intake pipe is in a closed state. After the flue gas pressure in the air intake pipe is higher than the minimum opening pressure, the flue gas pressure can deform the elastic member and drive the sealing member to move. At this time, the air intake pipe is opened, and the flue gas can pass through the delay structure and enter the gas chamber.

[0018] In some embodiments, the time delay structure includes a solenoid valve electrically connected to the sensor.

[0019] In the technical solution of this embodiment, the delay structure includes a solenoid valve, and the delayed opening of the solenoid valve is achieved through a delay circuit preset in the solenoid valve. Specifically, after the solenoid valve receives a signal from the sensor, the solenoid valve can be delayed in opening under the action of the delay circuit so that the inert gas enters the gas tank first.

[0020] In some embodiments, the solenoid valve includes a switch unit configured to open or close the air intake pipe;

[0021] The solenoid valve also includes a control unit, which is communicatively connected to the sensor and is used to receive signals and delay the control of the switch unit.

[0022] The technical solution of this embodiment provides a specific structure when the delay structure is a solenoid valve, so that the control unit of the solenoid valve is communicatively connected with the sensor. When the flue gas enters the air intake pipe, the control unit controls the switch unit to delay opening according to the signal of the sensor, so that the inert gas can enter the gas chamber in advance during the delay period and reduce the oxygen content in the gas chamber, thereby reducing the risk of combustion and explosion after the flue gas enters the gas chamber.

[0023] In some embodiments, before the flue gas enters the gas chamber, the content of inert gas in the gas chamber is greater than or equal to 85%.

[0024] The technical solution of this embodiment provides some ranges of inert gas content before the flue gas enters the gas bin. The inert gas content within this range can better reduce the combustion and explosion of the flue gas after entering the gas bin, thereby better reducing safety risks.

[0025] In some embodiments, the gas supply structure includes an air source, which is connected to the air tank through an air supply pipe. The air supply pipe is provided with a switch valve, which is used to receive signals and control the switch of the air supply pipe.

[0026] The technical solution of this embodiment provides some specific structures of the gas supply structure, so that the gas supply structure includes a gas source, a gas supply pipe and a switch valve, and enables the switch valve to receive a signal sent by a sensor to open the gas supply pipe, so that the inert gas can enter the gas warehouse before the flue gas.

[0027] In some embodiments, when the delay structure closes the air intake pipe, the time when the switch valve closes the air supply pipe is later than the time when the delay structure closes the air intake pipe.

[0028] In the technical solution of this embodiment, the time when the switch valve closes the air supply pipe is later than the time when the delay structure closes the air inlet pipe, so that the inert gas can continue to enter the gas bin after the flue gas no longer enters the gas bin, thereby facilitating a better reduction in the oxygen content in the gas bin, and further better reducing the risk of combustion and explosion of the flue gas.

[0029] In some embodiments, a pressure relief structure is provided on the gas cartridge.

[0030] In the technical solution of this embodiment, a pressure relief structure is provided on the gas bin to reduce the risk of damage to the gas bin due to excessive air pressure in the gas bin; at the same time, the risk of combustion and explosion is already low after the flue gas and inert gas are mixed. At this time, it is not easy for combustion and explosion to occur when the flue gas and inert gas are discharged out of the gas bin together.

[0031] In some embodiments, the flue gas treatment device further includes an alarm structure electrically connected to the sensor.

[0032] In the technical solution of this embodiment, the warning structure is electrically connected to the sensor, so that the warning structure can warn according to the signal of the sensor, thereby facilitating the staff to promptly discover the battery thermal runaway situation.

[0033] In a second aspect, some embodiments of the present application further provide a battery, comprising the flue gas treatment device provided by some embodiments of the first aspect, wherein an air inlet pipe of the flue gas treatment device is connected to at least one explosion-proof valve at one end away from the gas storage.

[0034] In a third aspect, some embodiments of the present application further provide an energy storage system, including the flue gas treatment device provided by some embodiments of the first aspect; and

[0035] Batteries, including explosion-proof valves;

[0036] One end of the air inlet pipe of the flue gas treatment device away from the gas bin is connected to at least one explosion-proof valve.

[0037] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0039] FIG1 is a structural schematic diagram of a flue gas treatment device according to some embodiments of the present application;

[0040] FIG2 is a second structural diagram of a flue gas treatment device provided in some embodiments of the present application;

[0041] FIG3 is a schematic structural diagram of a delay structure in a flue gas treatment device provided in some embodiments of the present application;

[0042] FIG4 is a schematic diagram of a sensor and a structure connected thereto in a flue gas treatment device provided in some embodiments of the present application.

[0043] The meanings of the marks in the figure are:

[0044] 100. Flue gas treatment device;

[0045] 10. Gas chamber; 11. Pressure relief structure;

[0046] 20. Gas supply structure; 21. Gas source; 22. On / off valve; 23. Gas supply pipe;

[0047] 30. Inlet pipe; 31. Sensor; 32. Delay structure; 321. Housing; 3211. Inlet end; 3212. Outlet end; 322. Elastic member; 323. Sealing member; 324. Switch unit; 325. Control unit;

[0048] 40. Warning structure. Modes for Carrying Out the Invention

[0049] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0051] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0052] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0054] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0055] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0056] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0057] With the development of strategic resources and heavy industries such as big data and nuclear power, large-scale energy storage devices can serve as backup power sources to solve the problem of power outages for important equipment. At the same time, with the development of the photovoltaic and wind power industries, large-scale energy storage devices can solve the problems of off-grid photovoltaic energy storage and wind power energy storage, as well as solve the problems of active power quality optimization and reactive power compensation in photovoltaic power stations. The market demand for energy storage is increasing, and the development of large-scale energy storage is becoming more and more rapid.

[0058] In energy storage systems, to mitigate the negative impact of thermal runaway on one or more batteries on the entire system, the high-temperature flue gas generated by thermal runaway typically needs to be quickly discharged into the air outside the system to prevent a chain reaction with other batteries in the system. However, due to the high oxygen content in air, discharging flue gas into the air can easily cause it to explode, which can also negatively impact the energy storage system.

[0059] Based on the above considerations, in order to reduce the risk of combustion and explosion of flue gas generated by thermal runaway of the battery being discharged into the air, an embodiment of the present application provides a flue gas treatment device, which is provided with a gas bin and an air intake pipe for supplying flue gas into the gas bin, and a sensor and a delay structure are provided on the air intake pipe; at the same time, a gas supply structure connected to the gas bin is also provided to provide inert gas to the gas bin through the gas supply structure.

[0060] In such a flue gas treatment device, after the flue gas enters the air inlet pipe, the sensor can send a signal to the gas supply structure, so that the gas supply structure can first provide inert gas to the gas bin to reduce the oxygen content in the gas bin; at the same time, the delay structure can block the flue gas to delay the time for the flue gas to enter the gas bin, and provide time for the gas supply structure to reduce the oxygen content in the gas bin; after the flue gas passes through the delay structure and enters the gas bin, the oxygen content in the gas bin is reduced under the action of the inert gas, and at the same time, the inert gas can also suppress the combustion and explosion of the flue gas, thereby reducing the risk of flue gas combustion and explosion.

[0061] The flue gas treatment device disclosed in the embodiments of this application can be used in various energy storage systems. Energy storage systems can be applied, but are not limited to, on the power supply side, the grid side, or the user side. The power supply side can include renewable energy grid integration, the grid side can include grid transmission and distribution and ancillary services, and the user side can include homes or industrial parks.

[0062] The flue gas treatment device disclosed in the embodiments of this application can be used in various battery-powered electrical devices. These devices may include, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery-powered vehicles, electric vehicles, ships, spacecraft, and the like. Electric toys may include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys. Spacecraft may include airplanes, rockets, space shuttles, and spacecraft.

[0063] For the convenience of explanation, the following embodiments are described by taking the flue gas treatment device 100 provided in some embodiments of the present application as an example of being applied to an energy storage system.

[0064] In the first aspect, referring to Figures 1, 2, and 4, some embodiments of the present application provide a flue gas treatment device 100 for treating high-temperature flue gas generated by thermal runaway of a battery. The flue gas treatment device 100 includes a gas chamber 10, a gas supply structure 20, and an air intake pipe 30. The gas supply structure 20 is connected to the gas chamber 10; one end of the air intake pipe 30 is connected to the gas chamber 10, and the air intake pipe 30 is used to supply flue gas into the gas chamber 10. The air intake pipe 30 is provided with a sensor 31, which is used to send a signal to the gas supply structure 20. The air intake pipe 30 is also provided with a delay structure 32 located between the sensor 31 and the gas chamber 10; the gas supply structure 20 is used to receive the signal and provide inert gas to the gas chamber 10, and the delay structure 32 is used to delay opening the air intake pipe 30 so that the time when the flue gas enters the gas chamber 10 is later than the time when the inert gas enters the gas chamber 10.

[0065] The gas silo 10 refers to a structure in the flue gas treatment device 100 for accommodating and treating flue gas. The gas silo 10 can be a square box structure, or a circular or other shaped box structure. The gas silo 10 has a chamber for accommodating flue gas, which can be a square space, a circular space or a space of other shapes; the material of the gas silo 10 can include metal, plastic or other materials; the gas silo 10 can be a closed structure that is only connected to the air supply structure 20 and the air inlet pipe 30, and the gas silo 10 can also be connected to the space outside the gas silo 10.

[0066] The gas supply structure 20 refers to the structure in the flue gas treatment device 100 for providing inert gas to the gas bin 10. The gas supply structure 20 is connected to the gas bin 10. The gas supply structure 20 may include structures such as pipelines and gas sources 21. The gas supply structure 20 may also include structures such as valves.

[0067] Inert gas refers to a gas that is chemically inactive and difficult to react chemically with other substances, such as nitrogen, argon, carbon dioxide, etc.; the gas supply structure 20 provides inert gas to the gas warehouse 10 to reduce the oxygen content in the gas warehouse 10, thereby reducing the occurrence of smoke combustion and explosion in the gas warehouse 10.

[0068] The oxygen content in the gas chamber 10 refers to the ratio of the amount of oxygen to the total amount of gas in the gas chamber 10. Since the oxygen content in the gas chamber 10 should be relatively fixed (usually similar to the oxygen content in the air outside the gas chamber 10), after the gas supply structure 20 fills the gas chamber 10 with inert gas, the total amount of gas in the gas chamber 10 increases but the amount of oxygen changes little, thereby reducing the ratio of the amount of oxygen to the total amount of gas in the gas chamber 10, that is, reducing the oxygen content.

[0069] The air intake pipe 30 refers to a structure in the flue gas treatment device 100 for collecting flue gas and supplying flue gas to the gas bin 10. One end of the air intake pipe 30 is connected to the gas bin 10, and the other end of the air intake pipe 30 can be opposite to the explosion-proof valve of the battery, or can extend to the vicinity of the battery; one air intake pipe 30 can correspond to only one battery, or two or more batteries. Depending on the number of batteries corresponding to the air intake pipe 30, the end of the air intake pipe 30 facing away from the gas bin 10 can have one or more air intake ends 3211; the air intake pipe 30 can be a square tube, or a circular tube or a tube of other shapes; the material of the air intake pipe 30 can include metal, plastic or other materials.

[0070] A sensor 31 is provided on the intake pipe 30. The sensor 31 is used to detect whether there is flue gas in the intake pipe 30. The sensor 31 may be a gas sensor 31. Since the flue gas is generated by thermal runaway of the battery and has a relatively high temperature, the sensor 31 may also be a temperature sensor 31. The entry of flue gas into the intake pipe 30 may also cause a change in the air pressure in the pipe, so the sensor 31 may also be a pressure sensor 31. It is understandable that the sensor 31 may also be other sensors 31.

[0071] After the sensor 31 detects that smoke enters the air inlet pipe 30 , the sensor 31 may send a signal to the air supply structure 20 . After receiving the signal, the air supply structure 20 may start and provide inert gas into the air chamber 10 .

[0072] The air intake pipe 30 is also provided with a delay structure 32. The delay structure 32 refers to a switch structure that outputs a signal after a period of time after the signal is input. For example, the delay structure 32 in the closed state can be opened again after a period of time after receiving the opening signal; the delay structure 32 is used to control the opening and closing state of the air intake pipe 30, that is, when the delay structure 32 is in the closed state, it can isolate the air intake pipe 30 to prevent smoke from entering the gas warehouse 10.

[0073] The setting of the delay structure 32 can delay the time for the flue gas to enter the gas chamber 10. During the delayed time, the inert gas can first enter the gas chamber 10 and reduce the oxygen content in the gas chamber 10, thereby reducing the risk after the flue gas enters the gas chamber 10.

[0074] The delay structure 32 is arranged between the sensor 31 and the gas chamber 10, that is, the smoke entering the air intake pipe 30 can first pass through the sensor 31 and then pass through the delay structure 32. The sensor 31 can first detect the smoke in the air intake pipe 30 and send a signal to the air supply structure 20.

[0075] When a battery in the energy storage system thermally runs away, at least part of the high-temperature flue gas generated by the thermal runaway can enter the air intake pipe 30. After entering the air intake pipe 30, the flue gas can first pass through the sensor 31 and then be blocked by the delay structure 32. After detecting that the flue gas has entered the air intake pipe 30, the sensor 31 can send a signal to the gas supply structure 20. After receiving the signal, the gas supply structure 20 can provide inert gas to the gas bin 10, and the inert gas will enter the gas bin 10 before the flue gas to reduce the oxygen content in the gas bin 10. After the flue gas enters the air intake pipe 30 for a period of time, the delay structure 32 opens. At this time, the flue gas can continue to flow and eventually enter the gas bin 10. At this time, the oxygen content in the gas bin 10 is low, and the risk of combustion and explosion is also low.

[0076] It is understandable that, in addition to being used to accommodate inert gas and flue gas, the gas silo 10 may also be provided with a spray structure or other structures to treat the flue gas, thereby further reducing the combustion, explosion or other safety risks of the flue gas.

[0077] In this embodiment, a gas bin 10 is provided to collect the flue gas generated by thermal runaway of the battery, and an air intake pipe 30 is provided to allow the flue gas to enter the gas bin 10 through the air intake pipe 30. A sensor 31 and a delay structure 32 are provided on the air intake pipe 30. After the flue gas enters the air intake pipe 30, the sensor 31 can send a signal to the gas supply structure 20, so that the gas supply structure 20 first provides inert gas to the gas bin 10 to reduce the oxygen content in the gas bin 10. At the same time, the delay structure 32 can block the flue gas to delay the time for the flue gas to enter the gas bin 10, and provide time for the gas supply structure 20 to reduce the oxygen content in the gas bin 10. Through the setting of the delay structure 32 and the gas supply structure 20, the oxygen content in the gas bin 10 is low when the flue gas enters the gas bin 10, thereby reducing the risk of flue gas combustion and explosion.

[0078] 1 and 2 , in some embodiments, the delay structure 32 includes a pressure relief valve.

[0079] The pressure relief valve can be a spring-type pressure relief valve, a lever-type pressure relief valve, a pulse-type pressure relief valve or other types of pressure relief valves; the pressure relief valve can automatically open and close according to the air pressure in the intake pipe 30. When there is less smoke in the intake pipe 30, the air pressure in the intake pipe 30 is low. At this time, the pressure relief valve is closed to prevent the smoke from entering the gas tank 10. As the smoke accumulates in the intake pipe 30, the air pressure in the intake pipe 30 gradually increases and reaches the opening threshold of the pressure relief valve. At this time, the pressure relief valve opens and allows the smoke to enter the gas tank 10.

[0080] The time that the pressure relief valve prolongs the smoke entering the gas warehouse 10 is related to the opening threshold of the pressure relief valve and the speed of the smoke pressure increase in the air intake pipe 30. The time that the smoke enters the gas warehouse 10 can be extended by selecting a pressure relief valve with different opening thresholds.

[0081] In this embodiment, the delay structure 32 includes a pressure relief valve to utilize the opening threshold of the pressure relief valve to achieve a delay effect. Specifically, before the flue gas pressure in the air intake pipe 30 reaches the opening threshold of the pressure relief valve, the delay structure 32 will close the air intake pipe 30 to block the flue gas from entering the gas bin 10, so that the inert gas can enter the gas bin 10 in advance, thereby reducing the risk of combustion and explosion after the flue gas enters the gas bin 10.

[0082] Referring to Figures 1 to 3, in some embodiments, the delay structure 32 includes a shell 321, in which an air flow cavity and an air inlet end 3211 and an air outlet end 3212 connected to the air flow cavity are provided. The air inlet end 3211 and the air outlet end 3212 are both connected to the air inlet pipe 30; the delay structure 32 also includes an elastic member 322 connected to the shell 321, and one end of the elastic member 322 is connected to a sealing member 323, and the elastic member 322 is used to push the sealing member 323 to seal the air inlet end 3211.

[0083] The shell 321 refers to the structure in the delay structure 32 that provides a fixed foundation for other structures. The shell 321 is also used for gas to flow through. The shell 321 can be a box structure or a frame structure. The shape of the shell 321 can be square, round or other shapes. The material of the shell 321 can include metal, plastic or other materials.

[0084] The airflow cavity refers to a cavity formed in the outer shell 321, through which the smoke can flow; the airflow cavity can be a square cavity, or a circular cavity or a cavity of other shapes; the airflow cavity includes an air inlet end 3211 and an air outlet end 3212, and the smoke in the air inlet pipe 30 can enter the airflow cavity from the air inlet end 3211, and the smoke in the airflow cavity can return to the air inlet pipe 30 through the air outlet end 3212 and finally flow to the gas storage 10.

[0085] The elastic member 322 refers to an elastic component in the delay structure 32 . The material of the elastic member 322 may include metal, rubber or other materials. The elastic member 322 may be a spring, a rubber column or other elastic components.

[0086] The seal 323 refers to a structure in the delay structure 32 used to seal the air inlet end 3211. The seal 323 can be supported against the outer shell 321 and seal the air inlet end 3211 under the action of the elastic member 322; the seal 323 can be a rubber plug, a sealing sheet or other structural parts that can seal the air inlet end 3211; the material of the seal 323 can include metal, rubber or other materials.

[0087] The smoke entering the air inlet pipe 30 can enter the air flow cavity through the air inlet end 3211 after pushing the seal 323 and compressing the elastic part 322, and then enter the air inlet pipe 30 through the air outlet end 3212; and after the gas in the air tank 10 enters the air flow cavity through the air outlet end 3212, it can only press the seal 323 to the air inlet end 3211, so that it is not easy to enter the air inlet pipe 30 through the air inlet end 3211, so as to achieve the effect of one-way flow of smoke.

[0088] When the smoke first enters the air inlet pipe 30, the air pressure in the air inlet pipe 30 is relatively small, and the thrust generated by the airflow is smaller than the elastic force of the elastic member 322. The airflow cannot push the sealing member 323 to move. At this time, the delay structure 32 closes the air inlet pipe 30, and the smoke is not easy to enter the air chamber 10; as the smoke accumulates near the sealing member 323, the air pressure gradually increases. When the thrust generated by the air pressure is greater than the elastic force of the elastic member 322, the airflow pushes the sealing member 323 to move and opens the air inlet end 3211. At this time, the delay structure 32 is opened, and the airflow can enter the airflow cavity and can flow into the air inlet pipe 30 through the air outlet end 3212; that is, the delay structure 32 achieves the effect of delayed opening and closing through the elastic force of the elastic member 322.

[0089] It can be understood that the elasticity of the elastic member 322 can be set according to data such as the rate of increase of air pressure in the air intake pipe 30 and the air supply efficiency of the air supply structure 20, so that the oxygen content in the gas tank 10 can be lower when the delay structure 32 is opened, thereby reducing the risk of combustion and explosion when smoke enters the gas tank 10.

[0090] This embodiment provides some specific structures when the delay structure 32 is a pressure relief valve. The air intake pipe 30 is closed by the elastic member 322 and the sealing member 323. Before the smoke pressure in the air intake pipe 30 is lower than the minimum opening pressure, the smoke pressure is not easy to cause the elastic member 322 to deform and drive the sealing member 323 to move. At this time, the air intake pipe 30 is in a closed state. After the smoke pressure in the air intake pipe 30 is higher than the minimum opening pressure, the smoke pressure can cause the elastic member 322 to deform and drive the sealing member 323 to move. At this time, the air intake pipe 30 is opened, and the smoke can pass through the delay structure 32 and enter the gas tank 10.

[0091] 1 , 2 , and 4 , in some embodiments, the delay structure 32 is a solenoid valve electrically connected to the sensor 31 .

[0092] A solenoid valve refers to a device that utilizes electromagnetic control. The solenoid valve can control the opening and closing of its intake pipe 30 through a preset program. The solenoid valve is electrically connected to the sensor 31 and can receive signals from the sensor 31. The solenoid valve can delay opening after receiving the signal from the sensor 31, so a delay circuit can be set inside the solenoid valve to achieve the effect of delayed opening and closing.

[0093] In this embodiment, the delay structure 32 includes a solenoid valve, and the delayed opening of the solenoid valve is achieved through a delay circuit preset in the solenoid valve. Specifically, after the solenoid valve receives a signal from the sensor 31, the solenoid valve can be delayed in opening under the action of the delay circuit so that the inert gas enters the gas tank 10 first.

[0094] 1 , 2 , and 4 , in some embodiments, the solenoid valve includes a switch unit 324 , which is used to open or close the intake pipe 30 ; the solenoid valve also includes a control unit 325 , which is communicatively connected to the sensor 31 , and is used to receive signals and delay control the action of the switch unit 324 .

[0095] The switch unit 324 refers to a structure in the solenoid valve for opening or closing the intake pipe 30; for example, the switch unit 324 may include a valve seat and a valve, the valve can leave the valve seat and be lifted up to open the intake pipe 30, and the valve can also fall on the valve seat to close the intake pipe 30.

[0096] The control unit 325 refers to a structure in the solenoid valve for controlling the action of the switch unit 324; for example, the control unit 325 may include an electromagnetic coil, which can cause the valve to leave the valve seat when energized, and can cause the valve to fall back to the valve seat when de-energized.

[0097] The control unit 325 is communicatively connected to the sensor 31 so that the control unit 325 can receive the signal from the sensor 31 and can control the action of the switch unit 324; the control unit 325 can delay the control of the action of the switch unit 324. For example, a delay circuit is provided in the control unit 325. After the control unit 325 receives the signal from the sensor 31, the delay circuit can delay the action of sending the signal to the switch unit 324, thereby achieving the effect of delaying the control of the action of the switch unit 324. During the delay time, the inert gas can first enter the gas tank 10 to reduce the oxygen content in the gas tank 10.

[0098] This embodiment provides a specific structure when the delay structure 32 is a solenoid valve, so that the control unit 325 of the solenoid valve is communicated with the sensor 31. When the flue gas enters the air inlet pipe 30, the control unit 325 controls the switch unit 324 to delay opening according to the signal of the sensor 31, so that the inert gas can enter the gas tank 10 in advance during the delay period and reduce the oxygen content in the gas tank 10, thereby reducing the risk of combustion and explosion after the flue gas enters the gas tank 10.

[0099] In some embodiments, before the flue gas enters the gas chamber 10, the content of inert gas in the gas chamber 10 is greater than or equal to 85%. For example, before the flue gas enters the gas chamber 10, the content of inert gas in the gas chamber 10 can be 85%, 86%, 87%, 88%, 89%, 90%, 95% or other values.

[0100] The content of inert gas in the gas bin 10 is the ratio of the amount of inert gas to the total amount of gas in the gas bin 10. The higher the content of inert gas in the gas bin 10, the lower the content of oxygen in the gas bin 10, and the lower the risk of combustion and explosion when flue gas enters the gas bin 10.

[0101] The content of inert gas before the flue gas enters the gas bin 10 is related to the gas supply volume per unit time of the gas supply structure 20, the extended time of the delay structure 32, etc. The content of inert gas before the flue gas enters the gas bin 10 can be made greater than or equal to 85% by adjusting parameters such as the gas supply volume per unit time of the gas supply structure 20 and the extended time of the delay structure 32.

[0102] This embodiment provides some ranges of inert gas content before the flue gas enters the gas bin 10. The inert gas content within this range can better reduce the explosion of the flue gas after entering the gas bin 10, thereby better reducing safety risks.

[0103] 1 , 2 , and 4 , in some embodiments, the gas supply structure 20 includes a gas source 21 , which is connected to the gas chamber 10 via a gas supply pipe 23 . A switch valve 22 is provided on the gas supply pipe 23 , which is used to receive signals and control the switching of the gas supply pipe 23 .

[0104] The gas source 21 refers to the structure that provides inert gas in the gas supply structure 20. The gas source 21 may include a tank body, a box body and other structures for containing inert gas. The gas source 21 may also include a structure such as an air pump that provides pressure; the gas source 21 is connected to the gas warehouse 10 through the gas supply pipe 23, that is, one end of the gas supply pipe 23 is connected to the gas source 21, and the other end of the gas supply pipe 23 is connected to the gas warehouse 10; the gas supply pipe 23 can be a square tube, a round tube or a tube structure of other shapes; the material of the gas supply pipe 23 may include metal, plastic or other materials.

[0105] The switch valve 22 refers to a structure used to open or close the gas supply pipe 23. The switch valve 22 can receive the signal of the sensor 31 and open or close. Specifically, after the flue gas enters the air intake pipe 30, the switch valve 22 can open according to the signal of the sensor 31 to allow the inert gas to enter the gas warehouse 10. After the flue gas no longer enters the air intake pipe 30, the switch valve 22 can close the gas supply pipe 23 according to the signal of the sensor 31 to prevent the inert gas from entering the gas warehouse 10.

[0106] When the sensor 31 detects that flue gas enters the air intake pipe 30, the sensor 31 sends a signal to the switch valve 22, and the switch valve 22 opens after receiving the signal, so that the inert gas provided by the gas source 21 can enter the gas warehouse 10; when the sensor 31 cannot detect flue gas in the air intake pipe 30, the switch valve 22 can close the gas supply pipe 23 according to the signal of the sensor 31 to prevent the inert gas from entering the gas warehouse 10.

[0107] This embodiment provides some specific structures of the gas supply structure 20, so that the gas supply structure 20 includes a gas source 21, a gas supply pipe 23 and a switch valve 22, and enables the switch valve 22 to receive a signal sent by the sensor 31 to open the gas supply pipe 23, so that the inert gas can enter the gas warehouse 10 before the flue gas.

[0108] 1 , 2 and 4 , in some embodiments, when the delay structure 32 closes the air intake pipe 30 , the time when the switch valve 22 closes the air supply pipe 23 is later than the time when the delay structure 32 closes the air intake pipe 30 .

[0109] The situation in which the delay structure 32 closes the air intake pipe 30 is when there is no more smoke accumulated in the air intake pipe 30 or the smoke content is low; after the delay structure 32 closes the air intake pipe 30, the time when the switch valve 22 closes the air supply pipe 23 is later than the time when the delay structure 32 closes the air intake pipe 30, that is, after the smoke no longer enters the gas storage 10, the gas source 21 can still provide inert gas to the gas storage 10 to reduce the oxygen content in the gas storage 10 and reduce the risk of combustion and explosion.

[0110] To achieve this effect, the switch valve 22 can be a solenoid valve, and a delay circuit is set in the switch valve 22. When the smoke content in the intake pipe 30 is lower than the detection lower limit of the sensor 31, the delay structure 32 is closed. At this time, the sensor 31 sends a signal to the switch valve 22, and the switch valve 22 receives the signal and extends the action time through the delay circuit. After that, the switch valve 22 is closed, so that the time when the switch valve 22 closes the air supply pipe 23 is later than the time when the delay structure 32 closes the intake pipe 30, thereby further reducing the oxygen content in the gas warehouse 10, and further reducing the risk of smoke explosion.

[0111] For example, after the delay structure 32 closes the air inlet pipe 30, the switch valve 22 continues to open the air supply pipe 23 and the gas source 21 continues to provide inert gas until the inert gas content in the gas tank 10 is greater than or equal to 90%. Then, the switch valve 22 continues to open for 3 seconds and then closes to further reduce the risk of combustion and explosion.

[0112] In this embodiment, the time when the switch valve 22 closes the air supply pipe 23 is later than the time when the delay structure 32 closes the air inlet pipe 30, so that the inert gas can continue to enter the gas bin 10 after the flue gas no longer enters the gas bin 10, thereby facilitating a better reduction in the oxygen content in the gas bin 10, and further reducing the risk of combustion and explosion of the flue gas.

[0113] 2 , in some embodiments, a pressure relief structure 11 is provided on the gas chamber 10 .

[0114] The pressure relief structure 11 refers to a structure that can automatically open and close according to the air pressure inside the gas tank 10. When the air pressure inside the gas tank 10 is higher than the opening pressure threshold of the pressure relief structure 11, the pressure relief structure 11 can be opened so that the gas in the gas tank 10 can be discharged to the outside through the pressure relief structure 11.

[0115] The pressure relief structure 11 can be a spring-type pressure relief valve, a lever-type pressure relief valve or other pressure relief structures 11 that can be opened and closed multiple times. The pressure relief structure 11 can also be a rupture-type safety pressure relief device, such as an explosion-proof cap, a bursting disc, a fusible plug and other pressure relief structures 11; the pressure relief structure 11 on the gas tank 10 can be one, two or more.

[0116] In this embodiment, a pressure relief structure 11 is provided on the gas bin 10 to reduce the risk of damage to the gas bin 10 due to excessive air pressure in the gas bin 10; at the same time, the risk of combustion and explosion is already low after the flue gas and the inert gas are mixed. At this time, the flue gas and the inert gas are discharged together to the outside of the gas bin 10, and combustion and explosion are not likely to occur.

[0117] 2 and 4 , in some embodiments, the flue gas treatment device 100 further includes an alarm structure 40 electrically connected to the sensor 31 .

[0118] The alarm structure 40 refers to a structure in the flue gas treatment device 100 that is mainly used to warn the staff. The alarm structure 40 may include a buzzer, a horn, a warning light or other structures with alarm capabilities; the alarm structure 40 is electrically connected to the sensor 31 and can receive the signal from the sensor 31, that is, when the flue gas enters the air intake pipe 30, the sensor 31 can also send a signal to the alarm structure 40, and the alarm structure 40 will sound an alarm after receiving the signal to facilitate the attention of the staff.

[0119] It is understandable that the alarm structure 40 may further include a signal sending unit, and send an alarm signal to a monitoring room, a monitoring platform, a control computer and other equipment through the signal sending unit.

[0120] In this embodiment, the warning structure 40 is electrically connected to the sensor 31 so that the warning structure 40 can give an alarm according to the signal of the sensor 31 , thereby facilitating the staff to promptly discover the battery thermal runaway situation.

[0121] 2 and 4 , in some embodiments, the flue gas treatment device 100 includes a gas bin 10, which is connected to an air intake pipe 30, on which a sensor 31 is provided, and a delay device is provided between the sensor 31 and the air intake pipe 30; the gas bin 10 is also connected to an air supply pipe 23, the other end of the air supply pipe 23 is connected to an air source 21, and the air supply pipe 23 is provided with a switch valve 22; the gas bin 10 is also provided with a pressure relief structure 11.

[0122] The flue gas treatment device 100 further includes a warning structure 40 .

[0123] When a battery in the energy storage system thermally runs away, the high-temperature flue gas generated by the thermal runaway can enter the intake pipe 30. After entering the intake pipe 30, the flue gas can first pass through the sensor 31 and then be blocked by the delay structure 32. After detecting that the flue gas has entered the intake pipe 30, the sensor 31 can send a signal to the switch valve 22. After receiving the signal, the switch valve 22 can open the gas supply pipe 23 so that the gas source 21 can provide inert gas to the gas tank 10, and the inert gas will enter the gas tank 10 before the flue gas to reduce the oxygen content in the gas tank 10. After the flue gas enters the intake pipe 30 for a period of time, the delay structure 32 opens. At this time, the flue gas can continue to flow and eventually enter the gas tank 10. At this time, the oxygen content in the gas tank 10 is low, and the risk of combustion and explosion is also low.

[0124] When there is no more smoke or less smoke in the air inlet pipe 30, the delay structure 32 is closed, and the sensor 31 sends a signal to the switch valve 22. After receiving the signal, the switch valve 22 delays closing the air supply pipe 23 so that the inert gas can still enter the gas warehouse 10 after the smoke no longer enters the gas warehouse 10.

[0125] In a second aspect, some embodiments of the present application further provide a battery, including the flue gas treatment device 100 provided in some embodiments of the first aspect.

[0126] The battery may include one or more explosion-proof valves, and the end of the air intake pipe 30 away from the gas tank 10 is connected to at least one explosion-proof valve, that is, the other end of the air intake pipe 30 can be opposite to and connected to only one explosion-proof valve, or the other end of the air intake pipe 30 can be connected to multiple explosion-proof valves; for example, the end of the air intake pipe 30 away from the gas tank 10 can be an open structure and opposite to multiple explosion-proof valves, or the end of the air intake pipe 30 away from the gas tank 10 can be connected to multiple pipe fittings through a multi-way adapter, and the multiple pipe fittings can be respectively corresponding to multiple explosion-proof valves.

[0127] In such a battery, the high-temperature flue gas generated by thermal runaway of the battery can directly enter the air intake pipe 30 and then the gas chamber 10, thereby reducing damage to other adjacent structures and reducing the risk of combustion and explosion under the action of inert gas.

[0128] In a third aspect, some embodiments of the present application further provide an energy storage system, comprising the flue gas treatment device 100 provided in some embodiments of the first aspect.

[0129] The energy storage system also includes a battery, which can be one, two, or more. The battery includes an explosion-proof valve, which is a pressure relief structure in the battery used to release internal pressure when the internal pressure or temperature reaches a threshold. A battery can include one explosion-proof valve or two or more explosion-proof valves.

[0130] One end of the air intake pipe 30 away from the gas storage 10 is connected to at least one explosion-proof valve, that is, the other end of the air intake pipe 30 can be opposite to and connected to only one explosion-proof valve, or the other end of the air intake pipe 30 can be connected to multiple explosion-proof valves. The air intake pipe 30 can receive smoke generated by only one battery, or it can receive smoke generated by multiple batteries; for example, the end of the air intake pipe 30 away from the gas storage 10 can be an open structure and opposite to multiple explosion-proof valves, or the end of the air intake pipe 30 away from the gas storage 10 can be connected to multiple pipe fittings through a multi-way adapter, and the multiple pipe fittings can correspond to multiple explosion-proof valves respectively.

[0131] In such an energy storage system, the high-temperature flue gas generated by thermal runaway of a battery can directly enter the air intake pipe 30 and then the gas chamber 10, thereby reducing damage to other batteries and reducing the risk of combustion and explosion under the action of inert gas.

[0132] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A flue gas treatment device, wherein: include: Gas chamber; An air supply structure, connected to the air chamber; as well as an air intake pipe, one end of which is in communication with the air bin, the air intake pipe being used to supply smoke into the air bin, the air intake pipe being provided with a sensor for sending a signal to the air supply structure, and the air intake pipe being further provided with a delay structure located between the sensor and the air bin; The gas supply structure is used to receive the signal and provide inert gas to the gas bin, and the delay structure is used to delay opening of the air inlet pipe so that the time when the flue gas enters the gas bin is later than the time when the inert gas enters the gas bin.

2. The flue gas treatment device according to claim 1, wherein: The time delay structure includes a pressure relief valve.

3. The flue gas treatment device according to claim 1 or 2, wherein: The delay structure includes a shell, an air flow cavity and an air inlet and an air outlet connected to the air flow cavity are provided in the shell, and the air inlet and the air outlet are both connected to the air inlet pipe; The delay structure further includes an elastic member connected to the housing, one end of the elastic member is connected to a sealing member, and the elastic member is used to push the sealing member to seal the air inlet end.

4. The flue gas treatment device according to any one of claims 1 to 3, wherein: The time delay structure includes a solenoid valve electrically connected to the sensor.

5. The flue gas treatment device according to claim 4, wherein: The solenoid valve includes a switch unit, and the switch unit is used to open or close the intake pipe; The solenoid valve further includes a control unit, which is communicatively connected to the sensor and configured to receive the signal and delay control the action of the switch unit.

6. The flue gas treatment device according to any one of claims 1 to 5, wherein: Before the flue gas enters the gas bin, the content of the inert gas in the gas bin is greater than or equal to 85%.

7. The flue gas treatment device according to any one of claims 1 to 6, wherein: The gas supply structure includes an air source, which is connected to the air storage through an air supply pipe. A switch valve is provided on the air supply pipe, and the switch valve is used to receive the signal and control the switch of the air supply pipe.

8. The flue gas treatment device according to claim 7, wherein: In the case where the delay structure closes the air intake pipe, the time when the switch valve closes the air supply pipe is later than the time when the delay structure closes the air intake pipe.

9. The flue gas treatment device according to any one of claims 1 to 8, wherein: The gas bin is provided with a pressure relief structure.

10. The flue gas treatment device according to any one of claims 1 to 9, wherein: The flue gas treatment device further includes an alarm structure electrically connected to the sensor.

11. A battery, wherein: comprising a flue gas treatment device according to any one of claims 1 to 10 and at least one explosion-proof valve; One end of the air inlet pipe of the flue gas treatment device away from the gas bin is connected to at least one explosion-proof valve.

12. An energy storage system, wherein: comprising a flue gas treatment device according to any one of claims 1 to 10; as well as A battery, the battery comprising an explosion-proof valve; One end of the air inlet pipe of the flue gas treatment device away from the gas bin is connected to at least one explosion-proof valve.

Images