Flue gas treatment device, energy storage equipment and electric equipment

Abstract

The utility model discloses a flue gas treatment device, energy storage equipment and electric equipment. The device comprises a gas containing cavity and an exhaust channel, one end of the exhaust channel communicates with the gas containing cavity, the other end of the exhaust channel is connected with a shell of target equipment, and a connection control assembly is arranged at the joint of the other end of the exhaust channel and the shell; the conduction control assembly is in an open state when the target equipment is in thermal runaway, and is in a closed state when the target equipment is not in thermal runaway; and under the condition that the thermal runaway of the target equipment does not occur, an air pressure difference exists between the air pressure in the air accommodating cavity and the air pressure in the shell. According to the scheme provided by the embodiment of the invention, the exhaust speed of the equipment can be increased, and smoke residues in the equipment are reduced, so that the explosion risk is reduced when the equipment is subjected to thermal runaway.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and particularly to a flue gas treatment device, an energy storage device, and an electrical equipment. Background Art

[0002] With the rise and development of new energy technologies, more and more equipment operations require the use of energy storage devices, and the safety of energy storage devices has become increasingly important.

[0003] Currently, in the case of thermal runaway of equipment, a large amount of combustible flue gas is often generated. How to timely discharge the generated combustible flue gas from the equipment has become a key issue in improving the safety of the equipment.

[0004] Existing flue gas treatment methods are often not conducive to discharging combustible flue gas, resulting in slow exhaust speed of the equipment and easy residue of flue gas in the equipment, thus making the equipment have a high risk of combustion and explosion during thermal runaway. Utility Model Content

[0005] The present application provides a flue gas treatment device, an energy storage device, and an electrical equipment, which can improve the exhaust speed of the equipment, reduce the residue of flue gas in the equipment, and thus reduce the risk of combustion and explosion when the equipment undergoes thermal runaway.

[0006] In a first aspect, the present application provides a flue gas treatment device, which includes: a gas accommodation cavity and an exhaust passage. One end of the exhaust passage is communicated with the gas accommodation cavity, and the other end is connected to the housing of the target equipment, and a conduction control component is provided at the connection between the other end and the housing; the conduction control component is in an open state when the target equipment undergoes thermal runaway and in a closed state when thermal runaway does not occur; in the case where the target equipment does not undergo thermal runaway, there is a pressure difference between the pressure inside the gas accommodation cavity and the pressure inside the housing.

[0007] In this way, by providing a gas accommodation cavity, and in the case where the target equipment does not undergo thermal runaway, there is a pressure difference between the pressure inside the gas accommodation cavity and the pressure inside the housing of the target equipment. Thus, in the case where the target equipment undergoes thermal runaway, with the opening of the conduction control component, the pressure difference can be utilized to prompt the target equipment to quickly discharge the flue gas generated inside it when thermal runaway occurs, thereby improving the exhaust speed of the equipment, reducing the residue of flue gas in the equipment, and enabling the equipment to reduce the risk of combustion and explosion when thermal runaway occurs.

[0008] In some embodiments, the pressure inside the gas accommodation cavity is greater than the pressure inside the housing; a first pressure relief mechanism is provided on the housing, and the first pressure relief mechanism and the conduction control component are oppositely arranged on both sides of the housing.

[0009] In this way, by setting the air pressure inside the gas-containing cavity to be greater than the air pressure inside the housing of the target device, and by oppositely arranging the first pressure relief mechanism on the housing and the conduction control component on both sides of the housing, in the case of thermal runaway of the target device, the gas inside the gas-containing cavity can quickly enter the target device under the assistance of the pressure difference, and the gas inside the target device can be forced to be discharged from the first pressure relief mechanism. During this process, the concentration of combustible flue gas is reduced, thereby reducing the combustion and explosion risk of the device. Moreover, as the gas inside the gas-containing cavity enters the target device, the air pressure inside the target device increases, which can further prompt the first pressure relief mechanism to open earlier, thereby improving the exhaust speed of the device and reducing the flue gas residue in the device.

[0010] In some embodiments, the gas-containing cavity is filled with inert gas.

[0011] In this way, by filling the gas-containing cavity with inert gas, in the case of thermal runaway of the target device, the inert gas inside the gas-containing cavity can be discharged into the target device by the pressure difference and fully mixed with the combustible flue gas, thereby reducing the concentration of the combustible flue gas and further reducing the combustion and explosion risk of the device.

[0012] In some embodiments, the device further includes a controller; the controller is connected to the conduction control component and is configured to obtain the gas property value inside the housing and control the opening and closing of the conduction control component according to the gas property value inside the housing.

[0013] In this way, by setting the controller, it is possible to determine whether the target device has thermal runaway according to the gas property value inside the housing of the target device, and further realize the control process of the opening and closing states of the conduction control component.

[0014] In some embodiments, the device further includes a sensor disposed inside the housing; the sensor is connected to the controller and is configured to collect the gas property value inside the housing.

[0015] In this way, by arranging the sensor inside the housing, the gas property value inside the housing can be collected in real time, which is convenient for judging whether the target device has thermal runaway.

[0016] In some embodiments, the target device includes battery cells disposed inside the housing, and a second pressure relief mechanism is disposed on the battery cells;

[0017] The sensor is disposed on the target inner wall of the housing, and the target inner wall includes the inner wall corresponding to the gas discharge direction of the second pressure relief mechanism.

[0018] In this way, by disposing the sensor on the inner wall corresponding to the gas discharge direction of the second pressure relief mechanism on the battery cell inside the target device, when the battery cell undergoes thermal runaway and discharges flue gas through the second pressure relief mechanism, the sensor can timely sense the flue gas when it is discharged, and then timely control the conduction control component to open, so that the gas in the gas accommodation cavity is discharged into the target device.

[0019] In some embodiments, the sensor is disposed at a position on the target inner wall close to the first pressure relief mechanism.

[0020] In this way, by disposing the sensor at a position on the target inner wall close to the first pressure relief mechanism, the gas property value near the first pressure relief mechanism of the target device can be detected more accurately, and then the conduction control component can be controlled to open more accurately and timely, so that the gas in the gas accommodation cavity is discharged into the target device.

[0021] In some embodiments, the sensor includes at least one of a gas sensor, a pressure sensor, and a smoke sensor.

[0022] In some embodiments, a first pressure relief mechanism is disposed on the housing, the gas accommodation cavity includes a flue gas treatment cavity, and the first pressure relief mechanism is reused as the conduction control component; the air pressure inside the flue gas treatment cavity is less than the atmospheric pressure.

[0023] In this way, by providing a negative pressure flue gas treatment cavity with an internal air pressure less than the atmospheric pressure, when the target device undergoes thermal runaway, the flue gas inside the target device can be timely sucked into the flue gas treatment cavity by using the air pressure difference, thereby improving the exhaust speed, reducing the flue gas residue in the device, and enabling the device to reduce the risk of combustion and explosion when thermal runaway occurs.

[0024] In some embodiments, the gas accommodation cavity includes a first cavity and a second cavity, and the conduction control component includes a first conduction control component and a second conduction control component; the first cavity is connected to the housing of the target device through the first conduction control component; the second cavity is connected to the housing of the target device through the second conduction control component; the air pressure inside the first cavity is greater than the air pressure inside the housing, and the air pressure inside the second cavity is less than the atmospheric pressure.

[0025] In this way, by forming a "high-medium-low" air pressure difference from the first cavity to the target device and then to the second cavity, it is promoted that the flue gas inside the device during thermal runaway of the target device is transmitted along the path of decreasing air pressure, thereby improving the exhaust speed, reducing the flue gas residue in the device, and enabling the device to reduce the risk of combustion and explosion when thermal runaway occurs.

[0026] Second aspect, the present application provides an energy storage device, which includes: a flue gas treatment device and a target device as described in any embodiment of the first aspect, and the target device includes a battery.

[0027] Third aspect, the present application provides an electrical equipment, which includes the energy storage device as described in any embodiment of the second aspect, and the energy storage device is used to provide electric energy. Description of the Drawings

[0028] The features, advantages and technical effects of the exemplary embodiments of the present application will be described below with reference to the drawings.

[0029] Figure 1 Structural schematic diagram of the flue gas treatment device provided by some embodiments of the present application;

[0030] Figure 2 Structural schematic diagram of the flue gas treatment device provided by some embodiments of the present application;

[0031] Figure 3 Structural schematic diagram of the flue gas treatment device provided by some embodiments of the present application;

[0032] Figure 4 Structural schematic diagram of the flue gas treatment device provided by some embodiments of the present application;

[0033] Figure 5 Structural schematic diagram of the flue gas treatment device provided by some embodiments of the present application;

[0034] Figure 6 Structural schematic diagram of the flue gas treatment device provided by some embodiments of the present application;

[0035] Figure 7 Structural schematic diagram of the flue gas treatment device provided by some embodiments of the present application.

[0036] The reference numerals in the specific embodiments are as follows:

[0037] Flue gas treatment device 10, target device 20;

[0038] Gas accommodation cavity 11, exhaust passage 12, sensor 13;

[0039] Shell 21, conduction control component 22, first pressure relief mechanism 23, battery cell 24, second pressure relief mechanism 25;

[0040] First cavity 111, second cavity 112;

[0041] First conduction control component 221, second conduction control component 222.

[0042] In the accompanying drawings, the drawings are not necessarily drawn to actual scale. Detailed implementation manners

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0044] Currently, when a device undergoes thermal runaway, a large amount of combustible flue gas is often generated. When the flue gas increases to a certain pressure value, it will be discharged through a pressure relief mechanism. However, this conventional exhaust method is often not conducive to the discharge of combustible flue gas, resulting in a slow exhaust speed of the device, and the randomness of the transmission path of the flue gas in the device is large, making the flue gas easy to remain in the device. In addition, the increase in the concentration of combustible flue gas in the device will also make the device have a high risk of combustion and explosion.

[0045] To address the above technical problems, in the embodiments of the present application, a gas accommodation cavity is provided and connected to the housing of the target device through an exhaust passage. A conduction control component is provided at the connection between the exhaust passage and the housing. When the target device does not undergo thermal runaway, the conduction control component is in a closed state, and there is a pressure difference between the pressure inside the gas accommodation cavity and the pressure inside the housing of the target device. When the target device undergoes thermal runaway, the conduction control component is in an open state, and this pressure difference can be used to prompt the target device to quickly discharge the flue gas generated inside it when thermal runaway occurs, thereby improving the exhaust speed of the device, reducing the flue gas residue in the device, and enabling the device to reduce the risk of combustion and explosion when thermal runaway occurs.

[0046] The flue gas treatment device provided in the embodiments of the present application will be introduced in detail below.

[0047] Figure 1 is a schematic structural diagram of a flue gas treatment device provided in some embodiments of the present application, as Figure 1 shown. The flue gas treatment device 10 includes: a gas accommodation cavity 11 and an exhaust passage 12. One end of the exhaust passage 12 is communicated with the gas accommodation cavity 11, and the other end is connected to the housing of the target device 20. A conduction control component 22 is provided at the connection between the other end and the housing. The conduction control component 22 is in an open state when the target device 20 undergoes thermal runaway and in a closed state when thermal runaway does not occur. When the target device 20 does not undergo thermal runaway, there is a pressure difference between the pressure inside the gas accommodation cavity 11 and the pressure inside the housing.

[0048] The following is a detailed introduction to each part in the flue gas treatment device 10.

[0049] The gas accommodation cavity 11 can be a cavity capable of accommodating gas, such as a gas storage bin filled with a certain gas, or a gas storage bin capable of accommodating and treating the combustible flue gas discharged from the target device 20.

[0050] The exhaust passage 12 can be a hollow passage for transmitting gas. Exemplarily, the gas in the gas accommodation cavity 11 can be discharged into the target device 20 through the exhaust passage 12, and the gas inside the target device 20 can also be discharged into the gas accommodation cavity 11 through the exhaust passage 12. One end of the exhaust passage 12 can be communicated with the gas accommodation cavity 11, and the other end can be connected to the housing 21 of the target device 20 and be communicated with the inside of the target device 20 through the conduction control component 22.

[0051] The conduction control component 22 can be a valve component that can be opened in the case of thermal runaway of the target device 20, such as an electronic valve, an explosion-proof valve, etc. Exemplarily, the conduction control component 22 can be controlled to open in the case of thermal runaway of the target device 20, such as an electronic valve, etc.; the conduction control component 22 can also be automatically opened in the case of thermal runaway of the target device 20, such as an explosion-proof valve, etc.

[0052] In addition, when the target device 20 does not undergo thermal runaway, there is a pressure difference between the pressure inside the gas accommodation cavity 11 and the pressure inside the housing 21 of the target device 20. That is, when the target device 20 does not undergo thermal runaway, in one way, the pressure inside the gas accommodation cavity 11 is greater than the pressure inside the housing 21 of the target device 20, and in another way, the pressure inside the gas accommodation cavity 11 is less than the pressure inside the housing 21 of the target device 20.

[0053] Based on this, in some examples, when the target device 20 does not undergo thermal runaway, the conduction control component 22 is in a closed state, and there is a pressure difference between the pressure inside the gas accommodation cavity 11 and the pressure inside the housing 21 of the target device 20. When the target device 20 undergoes thermal runaway, a large amount of flue gas is generated in the target device 20, so that the conduction control component 22 is opened. At this time, by using the pressure difference between the gas accommodation cavity 11 and the inside of the target device 20, the flue gas generated in the target device 20 can be quickly discharged. Compared with the conventional exhaust method in an atmospheric pressure environment, the embodiment of the present application utilizes this pressure difference to improve the exhaust speed of the device and reduce the flue gas residue in the device, thereby reducing the risk of explosion and combustion of the device.

[0054] In addition, the target device 20 involved in the embodiment of the present application can be a device that can generate flue gas when thermal runaway occurs, such as a battery pack, a battery cabinet, a battery container, etc.

[0055] In this way, by providing the gas-containing cavity 11, there is a pressure difference between the pressure inside the gas-containing cavity 11 and the pressure inside the housing 21 of the target device 20 when the target device 20 does not undergo thermal runaway. Thus, when the target device 20 undergoes thermal runaway, with the opening of the conduction control component 22, the pressure difference can be utilized to prompt the target device 20 to quickly discharge the smoke generated inside it during thermal runaway, thereby improving the device's exhaust speed, reducing the smoke residue in the device, and enabling the device to reduce the risk of combustion and explosion during thermal runaway.

[0056] Based on this, in some embodiments of the present application, the pressure inside the gas-containing cavity 11 is greater than the pressure inside the housing 21. As Figure 2 shown, a first pressure relief mechanism 23 is provided on the housing 21, and the first pressure relief mechanism 23 and the conduction control component 22 are oppositely arranged on both sides of the housing 21.

[0057] Here, the first pressure relief mechanism 23 can be a valve mechanism that can automatically open when the pressure inside the target device 20 reaches a certain threshold, such as an explosion-proof valve. In this embodiment, the conduction control component 22 can be a valve mechanism that is controlled to open when the target device 20 undergoes thermal runaway, such as an electronic valve. The gas-containing cavity 11 can be a gas chamber filled with a certain gas.

[0058] Exemplarily, the first pressure relief mechanism 23 can be provided on the side of the housing 21 opposite to the side where the conduction control component 22 is located. For example, if the conduction control component 22 is provided on the left side of the housing 21 of the target device 20, the first pressure relief mechanism 23 can be provided on the right side of the housing 21 of the target device 20 (as Figure 2 shown). Another example is that if the conduction control component 22 is provided on the upper side of the housing 21 of the target device 20, the first pressure relief mechanism 23 can be provided on the lower side of the housing 21 of the target device 20 (not shown in the figure).

[0059] In addition, the pressure inside the gas-containing cavity 11 can be greater than the pressure inside the housing 21. In this case, the gas-containing cavity 11 can be, for example, a high-pressure gas chamber filled with a certain gas.

[0060] In this way, by setting the air pressure inside the gas-containing cavity 11 to be greater than the air pressure inside the housing 21 of the target device 20, and by oppositely arranging the first pressure relief mechanism 23 on the housing 21 and the conduction control component 22 on both sides of the housing 21, in the case of thermal runaway of the target device 20, the gas inside the gas-containing cavity 11 can quickly enter the target device 20 with the help of the pressure difference, and the gas inside the target device 20 is prompted to be discharged from the first pressure relief mechanism 23. During this process, the concentration of combustible flue gas is reduced, the combustion and explosion risk of the device is reduced, and as the gas inside the gas-containing cavity 11 enters the target device 20, the air pressure inside the target device 20 increases, which can further prompt the first pressure relief mechanism 23 to open earlier, thereby improving the exhaust speed of the device and reducing the flue gas residue in the device.

[0061] In addition, in some embodiments of the present application, the gas-containing cavity 11 is filled with an inert gas.

[0062] Here, the inert gas can be a type of gas with inactive chemical properties, such as rare gases like nitrogen or helium and their corresponding mixed gases.

[0063] Exemplarily, when it is detected that the target device 20 has a thermal runaway, the conduction control component 22 can be controlled to open, and the inert gas enters the target device 20 to mix with the flue gas. When the pressure inside the target device 20 increases and the first pressure relief mechanism 23 opens, on the premise that the judgment condition permits and the hazard of the mixed gas is low, the mixed gas can be directly discharged to the external environment. Of course, the mixed gas can also be discharged into a flue gas treatment cavity with normal pressure or negative pressure for further harmless treatment of the mixed gas.

[0064] In this way, by filling the gas-containing cavity 11 with an inert gas, in the case of thermal runaway of the target device 20, the inert gas inside the gas-containing cavity 11 can be discharged into the target device 20 by the pressure difference to fully mix with the combustible flue gas, thereby reducing the concentration of the combustible flue gas and further reducing the combustion and explosion risk of the device.

[0065] In addition, in some embodiments of the present application, in order to control the on and off states of the conduction control component, a corresponding controller can also be set. Based on this, the above-mentioned flue gas treatment device 10 can further include a controller (not shown in the figure); the controller is connected to the conduction control component 22 and is used to obtain the gas property value inside the housing 21 and control the opening and closing of the conduction control component 22 according to the gas property value inside the housing 21.

[0066] Here, the controller can be an independent controller disposed outside the target device 20 or a control module disposed inside the target device 20. The controller can obtain the gas property value inside the housing 21 of the target device through the data collected by the sensor or other data acquisition methods. Among them, the gas property value can include the property value that can identify the state of the flue gas generated when the target device 20 undergoes thermal runaway, such as the content value of a specific gas in the flue gas, the air pressure value of the gas, the concentration value of the smoke, etc.

[0067] Exemplarily, taking the gas property value as the air pressure value of the gas as an example, the controller can obtain the air pressure value inside the housing 21 of the target device in real time. If the air pressure value reaches the preset air pressure threshold at a certain moment, an opening instruction can be sent to the conduction control component 22 through the guide to control the opening of the conduction control component 22, and then the gas in the gas accommodation cavity 11 can be discharged into the target device 20 by using the air pressure difference, so that the flue gas in the target device 20 can be quickly discharged.

[0068] In this way, by setting the controller, it is possible to determine whether the target device 20 has undergone thermal runaway according to the gas property value inside the housing 21 of the target device 20, and then to control the opening and closing states of the conduction control component 22.

[0069] In addition, in some embodiments of the present application, in order to accurately obtain the gas property value inside the target device 20, a sensor can also be provided inside the target device 20. As Figure 3 shown, the above-mentioned flue gas treatment device 10 can also include a sensor 13 disposed inside the housing 21; the sensor 13 is connected to the controller and is used to collect the gas property value inside the housing 21.

[0070] Here, the sensor 13 can be disposed at any position inside the target device 20, for example, it can be disposed on the inner side wall of the housing 21. In addition, the sensor 13 can include at least one of a gas sensor, an air pressure sensor, and a smoke sensor. Among them, the gas sensor can be used to collect the content value of a specific gas in the flue gas, the air pressure sensor can be used to collect the air pressure value of the gas, and the smoke sensor can be used to collect the concentration value of the smoke.

[0071] Exemplarily, the sensor 13 can collect the gas property value inside the housing 21 of the target device in real time and send the gas property value to the controller. The controller determines whether the target device has undergone thermal runaway according to the gas property value and controls the conduction control component 22 to open in time when thermal runaway occurs.

[0072] In this way, by providing the sensor 13 inside the housing 21, the gas property value inside the housing 21 can be collected in real time, which is convenient for judging whether the target device 20 has undergone thermal runaway.

[0073] In addition, in order to improve the timeliness of sensor detection, in some embodiments of the present application, such as Figure 4 as shown, the target device 20 includes a battery cell 24 disposed inside the housing 21, and a second pressure relief mechanism 25 is disposed on the battery cell 24; the sensor 13 is disposed on the target inner sidewall of the housing 21, and the target inner sidewall includes the inner sidewall corresponding to the gas discharge direction of the second pressure relief mechanism 25.

[0074] Here, the target device 20 may include one or more battery cells 24, and a separate second pressure relief mechanism 25 may be disposed on each battery cell 24. The second pressure relief mechanism 25 may be a valve mechanism that can automatically open when the air pressure inside the battery cell 24 reaches a certain threshold, such as an explosion-proof valve, etc.

[0075] Exemplarily, if the gas discharge direction of the second pressure relief mechanism 25 is upward exhaust, the sensor 13 may be disposed on the upper inner sidewall of the housing 21 (such as Figure 4 as shown); if the gas discharge direction of the second pressure relief mechanism 25 is leftward exhaust, the sensor 13 may be disposed on the left inner sidewall of the housing 21 (not shown in the figure).

[0076] In this way, by disposing the sensor 13 on the inner sidewall corresponding to the gas discharge direction of the second pressure relief mechanism 25 on the battery cell 24 in the target device 20, when the battery cell 24 undergoes thermal runaway and discharges smoke through the second pressure relief mechanism 25, the sensor 13 can timely sense the smoke when the smoke is discharged, and then timely control the conduction control component 22 to open, so that the gas in the gas accommodation cavity 11 is discharged into the target device 20.

[0077] In addition, in order to further improve the accuracy and timeliness of sensor detection, such as Figure 5 as shown, in some embodiments of the present application, the sensor 13 is disposed at a position on the target inner sidewall close to the first pressure relief mechanism 23.

[0078] Exemplarily, as Figure 5 shown, if the first pressure relief mechanism 23 is disposed on the right side of the housing 21 of the target device 20, and the gas discharge direction of the second pressure relief mechanism 25 is upward exhaust, the sensor 13 may be disposed on the upper inner sidewall of the housing 21 and at the position closest to the first pressure relief mechanism 23, such as the position on the upper inner sidewall adjacent to the right sidewall of the housing 21.

[0079] In this way, by disposing the sensor 13 at a position on the target inner sidewall close to the first pressure relief mechanism 23, the gas property value near the first pressure relief mechanism 23 of the target device 20 can be detected more accurately, and then the conduction control component 22 can be controlled to open more accurately and timely, so that the gas in the gas accommodation cavity 11 is discharged into the target device 20.

[0080] In addition, in addition to the gas storage cavity 11 that can be set to have a pressure higher than the internal pressure of the target device 20, a gas storage cavity 11 with a pressure lower than the internal pressure of the target device 20 can also be set. Based on this, in some other embodiments of the present application, as Figure 6 shown, a first pressure relief mechanism 23 is provided on the housing 21. The gas storage cavity 11 includes a flue gas treatment cavity, and the first pressure relief mechanism 23 is reused as a conduction control component; the pressure inside the flue gas treatment cavity is less than the atmospheric pressure.

[0081] Here, the gas storage cavity 11 can be a flue gas treatment cavity for treating the combustible flue gas discharged from the target device 20, such as a flue gas treatment bin. The first pressure relief mechanism 23 on the housing 21 of the target device 20 can be reused as a conduction control component, that is, the conduction control component can be the first pressure relief mechanism 23, such as an explosion-proof valve.

[0082] In order to enable the target device 20 to discharge flue gas in a timely and rapid manner when a thermal runaway occurs, the flue gas treatment cavity can be set as a negative pressure chamber, that is, the pressure inside the gas storage cavity 11 is set to be less than the atmospheric pressure.

[0083] Exemplarily, when a thermal runaway occurs in the target device 20, the internal pressure of the target device 20 will increase. This negative pressure chamber of the flue gas treatment cavity will increase the pressure difference on both sides of the first pressure relief mechanism 23, causing the first pressure relief mechanism 23 to open earlier, and the flue gas quickly enters the flue gas treatment cavity from inside the target device 20. In this flue gas treatment cavity, nitrogen or other treatment means can be used to harmlessly treat the combustible flue gas.

[0084] In this way, by setting a negative pressure flue gas treatment cavity with an internal pressure less than the atmospheric pressure, when a thermal runaway occurs in the target device 20, the flue gas inside the target device 20 can be timely sucked into the flue gas treatment cavity by using the pressure difference, thereby improving the exhaust speed, reducing the flue gas residue in the device, and enabling the device to reduce the risk of combustion and explosion when a thermal runaway occurs.

[0085] In addition, on the basis of setting a flue gas treatment cavity with negative pressure, the embodiment of the present application can also simultaneously set an inert gas storage cavity with normal pressure or high pressure as described in the foregoing embodiments.

[0086] Combining the above two embodiments, in order to further improve the exhaust speed, reduce the flue gas residue in the device, and reduce the risk of combustion and explosion, a gas storage cavity with high pressure and a gas storage cavity with low pressure can be set. Based on this, in some embodiments of the present application, as Figure 7As shown, the gas containment cavity 11 includes a first cavity 111 and a second cavity 112, and the conduction control assembly 22 includes a first conduction control assembly 221 and a second conduction control assembly 222; the first cavity 111 is connected to the housing 21 of the target device 20 through the first conduction control assembly 221; the second cavity 112 is connected to the housing 21 of the target device 20 through the second conduction control assembly 222; the air pressure inside the first cavity 111 is greater than the air pressure inside the housing 21, and the air pressure inside the second cavity 112 is less than the atmospheric pressure.

[0087] Here, the first cavity 111 can be a gas chamber filled with a certain gas, such as a high-pressure inert gas chamber, and the second cavity 112 can be a gas chamber capable of containing and treating the combustible flue gas discharged from the target device 20, such as a negative-pressure flue gas treatment chamber. The above two cavities can have the same properties and structures as the gas containment cavities described in the previous two embodiments. For the sake of brevity, no more introduction will be made here.

[0088] In addition, the first cavity 111 and the second cavity 112 can be respectively connected to the housing 21 of the target device 20 through their respective exhaust channels, and the first cavity 111 can be internally connected to the housing 21 of the target device 20 through the first conduction control assembly 221, and the second cavity 112 can be internally connected to the housing 21 of the target device 20 through the second conduction control assembly 222. Among them, the first conduction control assembly 221 can be a valve assembly such as an electronic valve that can be controlled to open, and the second conduction control assembly 222 can be a valve assembly such as an explosion-proof valve that can be automatically opened under certain air pressure conditions.

[0089] Exemplarily, when it is detected that the target device 20 has a thermal runaway, the first conduction control assembly 221 between the first cavity 111 and the target device 20 can be controlled to open, and the high-pressure inert gas in the first cavity 111 enters the target device 20 and mixes with the flue gas to form a mixed gas. When the internal air pressure of the target device 20 increases and causes the second conduction control assembly 222 to automatically open, the mixed gas inside the target device 20 can quickly enter the second cavity 112 under the negative pressure of the second cavity 112 for treatment.

[0090] In this way, by forming a "high-medium-low" air pressure difference from the first cavity 111 to the target device 20 and then to the second cavity 112, it can promote the flue gas inside the device to be transmitted along the path of decreasing air pressure when the target device 20 has a thermal runaway, thereby improving the exhaust speed, reducing the flue gas residue in the device, and enabling the device to reduce the risk of combustion and explosion when there is a thermal runaway.

[0091] According to some embodiments of the present application, the present application further provides an energy storage device, including the flue gas treatment device and the target device described in any of the above solutions. The target device may include a battery, such as a battery pack, a battery cabinet, a battery container, etc.

[0092] According to some embodiments of the present application, the present application further provides an electrical equipment, including the energy storage device described in any of the above solutions, and the energy storage device is used to provide electrical energy for the electrical equipment.

[0093] The electrical equipment may be any of the foregoing devices or systems that use a battery.

[0094] Finally, it should be noted that 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 foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A flue gas treatment device, characterized in that: include: A gas containing cavity and an exhaust channel, wherein one end of the exhaust channel is connected to the gas containing cavity, and the other end is connected to the housing of the target device, and a conduction control component is provided at the connection between the other end and the housing; The conduction control component is in an on state when thermal runaway occurs in the target device, and is in a off state when thermal runaway does not occur; When the target device does not experience thermal runaway, there is a pressure difference between the gas pressure inside the gas containing cavity and the gas pressure inside the shell.

2. The device according to claim 1, characterized in that The gas pressure inside the gas containing cavity is greater than the gas pressure inside the shell; The shell is provided with a first pressure relief mechanism, and the first pressure relief mechanism and the conduction control component are arranged on two sides of the shell relatively.

3. The device according to claim 2, characterized in that The gas containing cavity is filled with inert gas.

4. The device according to claim 2 or 3, characterized in that Also includes a controller; The controller is connected to the conduction control component and is used to obtain the gas property value inside the shell and control the opening and closing of the conduction control component according to the gas property value inside the shell.

5. The device according to claim 4, characterized in that Also included is a sensor disposed inside the housing; The sensor is connected to the controller and is used to collect gas property values ​​inside the shell.

6. The device according to claim 5, characterized in that The target device includes a battery cell disposed inside the housing, and a second pressure relief mechanism is disposed on the battery cell; The sensor is arranged on a target inner wall of the housing, and the target inner wall includes an inner wall corresponding to a direction in which the second pressure relief mechanism discharges gas.

7. The device according to claim 6, characterized in that The sensor is disposed on the inner wall of the target at a position close to the first pressure relief mechanism.

8. The device according to any one of claims 5 to 7, characterized in that: The sensor includes at least one of a gas sensor, an air pressure sensor and a smoke sensor.

9. The device according to claim 1, characterized in that The housing is provided with a first pressure relief mechanism, the gas containing chamber includes a smoke treatment chamber, and the first pressure relief mechanism is reused as the conduction control component; The air pressure inside the flue gas treatment chamber is less than the atmospheric pressure.

10. The device according to claim 1, characterized in that The gas containing cavity includes a first cavity and a second cavity, and the conduction control component includes a first conduction control component and a second conduction control component; The first cavity is connected to the housing of the target device through the first conduction control component; The second cavity is connected to the housing of the target device through the second conduction control component; The air pressure inside the first cavity is greater than the air pressure inside the shell, and the air pressure inside the second cavity is less than the atmospheric pressure.

11. An energy storage device, characterized in that: include: The flue gas treatment device and target equipment according to any one of claims 1 to 10; The target device includes a battery.

12. An electrical device, characterized in that: The electrical device comprises the energy storage device as claimed in claim 11, and the energy storage device is used to provide electrical energy.

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