Rapid fire extinguishing device for electric automobile

Abstract

The utility model discloses a rapid fire extinguishing device for an electric automobile, which comprises a pressure tank, a fire extinguishing system, a fire extinguishing system, a fire extinguishing system and a fire extinguishing system, wherein the lower part in the pressure tank is filled with a mixture of foam liquid and water and the upper part is filled with compressed air with certain pressure; the switch control element is connected to the outlet of the pressure tank and used for controlling opening / closing of the outlet; the temperature detection unit is used for detecting the temperature of the battery pack and is in communication connection with the switch control element; a foam mixer; the valve is communicated with an outlet of the pressure tank and located downstream of the switch control element. Thus, when the temperature detection unit monitors that the interior of the battery pack is overheated, the switch control element can be quickly triggered to open the pressure tank, and air and mixed liquid with certain pressure enter the foam mixer to be quickly foamed and finally enter the battery pack to extinguish fire. A traditional compressed air tank body, a traditional foam liquid tank body and a traditional water tank body are integrated, the foam mixer is arranged at the end, miniaturization and portability of the compressed air foam generating device are achieved, the compressed air foam generating device can be installed in an electric automobile, and space is saved.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, and in particular to a rapid fire extinguishing device for electric vehicles. Background Technology

[0002] New energy vehicles are developing rapidly worldwide due to their advantages such as high efficiency and cleanliness. Unlike traditional Class A or Class B fires, lithium battery fires have their own unique characteristics, posing significant challenges to firefighting, mainly in the following three aspects: 1) rapid heating rate and high combustion temperature; 2) rapid spread; 3) easy reignition. Developing new lithium battery fire extinguishing technologies and devices with high efficiency and rapid cooling capabilities remains a key research challenge and hot topic in the field of lithium battery fire prevention and control.

[0003] In response to the characteristics and challenges of lithium battery fires, a series of research and development studies on fire extinguishing technologies for lithium battery fires have been conducted. These studies can be mainly divided into gas extinguishing technologies, solid extinguishing technologies, and water-based extinguishing technologies. 1) The extinguishing mechanisms of gas extinguishing technologies (such as heptafluoropropane, perfluorohexanone, CO2, etc.) and solid extinguishing technologies (such as dry powder, aerosol, etc.) are mainly based on suffocation or chemical inhibition, with cooling capacity as a secondary factor. Therefore, they are effective in extinguishing open flames, but cannot effectively inhibit the electrochemical reactions inside the battery, and there is still a risk of thermal runaway and reignition. 2) Water-based extinguishing technologies, represented by fine water mist, have good cooling effects, but require high spray pressure to optimize the effect of fine water mist penetrating the flames and reaching the battery surface for cooling. The equipment is large in size, occupies a large amount of vehicle space, and has a complex structure. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a rapid fire extinguishing device for electric vehicles.

[0005] This utility model proposes a rapid fire extinguishing device for electric vehicles, comprising:

[0006] A pressure tank, the lower part of which is filled with a mixture of foam liquid and water, and the upper part is filled with compressed air at a certain pressure;

[0007] A switch control element is connected to the outlet of the pressure tank and is used to control the opening / closing of the outlet;

[0008] A temperature detection unit is used to detect the temperature of the battery pack and is communicatively connected to the switch control element;

[0009] A foam mixer, connected to the outlet of the pressure tank and located downstream of the switch control element, is used to rapidly foam compressed air and a mixture under certain pressure from the outlet of the pressure tank, and to introduce the generated compressed air foam extinguishing agent into the battery pack for fire extinguishing and cooling.

[0010] Preferably, the mixture of foam liquid and water is a premixed liquid after the foam liquid and water are premixed at a volume ratio of 1 to 7:100.

[0011] Preferably, the total volume of the premixed liquid accounts for 20% to 60% of the volume of the pressure tank.

[0012] Preferably, the pressure of the compressed air is filled to 0.6 to 1.5 MPa.

[0013] Preferably, the switch control element is a solenoid valve.

[0014] Preferably, the temperature detection unit is a temperature sensor or the battery management system (BMS) integrated into the electric vehicle.

[0015] In summary, the present invention has the following beneficial effects: (1) After the foam liquid is premixed with water, it is added to the pressure tank. The lower part is filled with a mixture of foam liquid and water, and the upper part is filled with compressed air at a certain pressure. When the temperature detection unit detects that the battery pack is overheated, it will quickly trigger the switch control element of the pressure tank to open. The air and the mixture with a certain pressure will first enter the foam mixer to quickly foam, and finally enter the battery pack to extinguish the fire. The entire device integrates the traditional compressed air tank, foam liquid tank and water tank, and sets up a foam mixer at the end, realizing the miniaturization and portability of the compressed air foam generating device, which can be installed inside electric vehicles, saving valuable space; (2) This device is different from the traditional dry powder fire extinguishing and water spray fire extinguishing devices. It uses a high-efficiency compressed air foam fire extinguishing agent, which has a fire extinguishing efficiency 4 to 7 times higher than water. It has both high-efficiency fire extinguishing and cooling performance, and can quickly extinguish electric vehicle lithium battery pack fires and prevent reignition; (3) This device generates foam quickly. One part of water can produce eight parts of foam. Therefore, only a small amount of foam liquid and water premixed liquid needs to be filled, which reduces the weight and volume of the entire fire extinguishing device and is beneficial for the modification and installation of existing vehicles.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a rapid fire extinguishing device for electric vehicles according to an embodiment of the present invention.

[0018] In the picture:

[0019] 1. Pressure tank; 2. Mixture of foam liquid and water; 3. Compressed air; 4. Solenoid valve; 5. Foam mixer; 6. Temperature sensor; 7. Battery pack. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] like Figure 1 As shown in the figure, this embodiment proposes a rapid fire extinguishing device for electric vehicles, comprising:

[0022] Pressure tank 1, the lower part of which is filled with a mixture of foam liquid and water 2, and the upper part is filled with compressed air at a certain pressure 3;

[0023] A switch control element is connected to the outlet of pressure tank 1 and is used to control the opening / closing of the outlet;

[0024] Specifically, the switch control element is set as solenoid valve 4.

[0025] A temperature detection unit is used to detect the temperature of the battery pack 7 and is communicatively connected to the switch control element;

[0026] Foam mixer 5; connected to the outlet of pressure tank 1 and located downstream of the switch control element, is used to quickly foam the compressed air 3 with a certain pressure coming out of the outlet of pressure tank 1 with the mixture, and to put the generated compressed air foam extinguishing agent into the battery pack 7 for fire extinguishing and cooling.

[0027] Thus, the foam liquid is premixed with water and added to pressure tank 1. The lower part is filled with a mixture of foam liquid and water 2, and the upper part is filled with compressed air 3 at a certain pressure. When the temperature detection unit detects overheating inside the battery pack 7, it will quickly trigger the opening of the solenoid valve 4 of pressure tank 1. The pressurized air and mixture will first enter the foam mixer 5 to quickly foam, and finally enter the battery pack 7 to extinguish the fire. The entire device integrates the traditional compressed air tank, foam liquid tank, and water tank, and sets up the foam mixer 5 at the end, realizing the miniaturization and portability of the compressed air foam generating device. It can be installed inside electric vehicles, saving valuable space.

[0028] Furthermore, the foam liquid and water mixture 2 is defined as a premixed liquid obtained by premixing foam liquid and water at a volume ratio of 1 to 7:100. The total volume of the premixed liquid accounts for 20% to 60% of the volume of pressure tank 1.

[0029] Furthermore, the pressure of compressed air 3 is filled to 0.6–1.5 MPa.

[0030] In this embodiment, the temperature detection unit is either a temperature sensor 6 or the battery management system (BMS) integrated into the electric vehicle. The battery management system (BMS) is a technology specifically designed to monitor and manage battery packs. It aims to intelligently manage and maintain individual battery cells, ensuring safe operation of the battery pack, extending battery life, and optimizing battery performance. Its main functions include monitoring battery status, preventing overcharging and over-discharging, balancing battery charge, and providing real-time data.

[0031] In summary, the temperature signal detected by temperature sensor 6 or provided by the battery management system (BMS) of the electric vehicle is connected to solenoid valve 4. When the temperature at any location within the battery pack 7 exceeds the normal operating temperature of the battery, solenoid valve 4 controls the opening of pressure tank 1. Compressed air 3 under certain pressure and the mixture enter the foam mixer 5 from the outlet of pressure tank 1 for rapid foaming. The resulting compressed air foam extinguishing agent finally enters the battery pack 7 for rapid fire extinguishing and cooling. This allows for miniaturization of the fire extinguishing device, reducing its space and weight footprint in the vehicle, while simultaneously meeting the requirements for rapid fire extinguishing and continuous cooling to prevent reignition. The device has a simple structure, is easy to install, enables automated fire monitoring and extinguishing, and has good compatibility, making it suitable for retrofitting and adding to existing vehicles.

[0032] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A rapid fire extinguishing device for electric vehicles, characterized in that, include: A pressure tank, the lower part of which is filled with a mixture of foam liquid and water, and the upper part is filled with compressed air at a certain pressure; A switch control element is connected to the outlet of the pressure tank and is used to control the opening / closing of the outlet; A temperature detection unit is used to detect the temperature of the battery pack and is communicatively connected to the switch control element; A foam mixer, connected to the outlet of the pressure tank and located downstream of the switch control element, is used to rapidly foam compressed air and a mixture under certain pressure from the outlet of the pressure tank, and to introduce the generated compressed air foam extinguishing agent into the battery pack for fire extinguishing and cooling.

2. The rapid fire extinguishing device for electric vehicles according to claim 1, characterized in that, The mixture of foam liquid and water is defined as a premixed solution obtained by premixing foam liquid and water at a volume ratio of 1 to 7:

100.

3. The rapid fire extinguishing device for electric vehicles according to claim 2, characterized in that, The total volume of the premixed liquid accounts for 20-60% of the volume of the pressure tank.

4. The rapid fire extinguishing device for electric vehicles according to claim 1, characterized in that, The pressure of the compressed air is filled to 0.6-1.5 MPa.

5. The rapid fire extinguishing device for electric vehicles according to claim 1, characterized in that, The switch control element is a solenoid valve.

6. The rapid fire extinguishing device for electric vehicles according to claim 1, characterized in that, The temperature detection unit is set as a temperature sensor or the battery management system (BMS) built into the electric vehicle.

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