Fireproof safety air bag for electric vehicle battery pack

Abstract

The invention discloses a fireproof safety air bag for an electric vehicle battery pack. The fireproof safety air bag comprises an air bag support, an air bag body, a spraying nozzle, a flame sensor and a temperature sensor. Compared with the prior art, the invention has the advantages of quick response and effective isolation; multiple protection is achieved, and safety is improved; due to high-temperature-resistant design, flame retardance is enhanced; the structure is simple and installation is convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle safety, and in particular to a fireproof safety airbag for an electric vehicle battery pack. Background Art

[0002] In recent years, with the popularity of electric vehicles, the safety of battery packs has become increasingly prominent. When electric vehicle battery packs encounter abnormal conditions such as impact, overheating, and short circuit, they are very likely to cause fires or even explosions, posing a serious threat to passengers and the surrounding environment of the vehicle. Traditional safety protection measures, such as the insulation layer on the outside of the battery pack and the fire extinguisher inside the vehicle, can reduce the hazards of fire to a certain extent, but they often have limitations such as slow response speed, poor fire extinguishing effect, and inability to effectively isolate the fire source. Especially in the early stages of a fire, if the fire cannot be quickly controlled, it will spread rapidly, leading to serious consequences.

[0003] Therefore, it is particularly important to develop a safety protection system that can respond quickly in the early stage of a fire, effectively isolate the fire source, and have efficient fire extinguishing capabilities. Based on this demand, the present invention proposes a fireproof airbag system for electric vehicle battery packs. The system integrates multiple functions such as flame and temperature monitoring, rapid inflation isolation, and sprinkler fire extinguishing. It aims to provide all-round safety protection for electric vehicle battery packs through a strategy that combines physical isolation with fire extinguishing, ensuring that the fire can be quickly controlled in an emergency and protecting the safety of passengers and vehicles. Summary of the invention

[0004] The technical problem to be solved by the present invention is the safety protection problem of electric vehicle battery packs when facing fire risks. Specifically, electric vehicle battery packs may cause fires or even explosions under extreme operating conditions, such as battery short circuits, overcharging, overheating, or external impacts, posing a serious threat to the vehicle, passengers, and the surrounding environment. Traditional safety protection measures, such as simple insulation layers and fire extinguishers, often have limitations such as slow response speed, poor fire extinguishing effect, and inability to effectively isolate the fire source, making it difficult to quickly control the fire in the early stages of the fire and prevent the fire from spreading.

[0005] In order to solve the above technical problems, the present invention provides a technical solution: a fireproof safety airbag for an electric vehicle battery pack, comprising:

[0006] The airbag bracket is a rectangular frame structure, which is fixed around the battery pack by screws. The airbag bracket is equipped with an airbag with specifications matching the battery pack;

[0007] Airbag, the battery pack is embedded in the airbag, the airbag also includes an airbag gas generator and an external micro air pump, the airbag gas generator controls the airbag ejection after receiving the working instruction, and the micro air pump works at the same time and inflates the airbag;

[0008] Spray nozzles, including multiple spray nozzles evenly arranged at the top of the airbag bracket, and the spray nozzles are arranged toward the battery pack; the spray nozzles are connected to a matching spray pipeline, and the spray pipeline adopts a branch pipe and a main pipe design, each branch pipe corresponds to a spray nozzle, and multiple branch pipes are connected to a main pipe. After the airbag is inflated and popped out, the main pipe also pops out the connected quick connector, and the quick connector is used to connect to an external water supply source;

[0009] Flame sensor and temperature sensor, including multiple flame sensors and temperature sensors distributed on the airbag bracket, monitor the use status of the battery pack in real time, and send an alarm command to the airbag gas generator when flame and high temperature appear. After receiving the working command, the airbag gas generator controls the airbag ejection. When receiving the working command, the airbag gas generator sends a start command to the micro air pump, and the micro air pump immediately inflates the airbag.

[0010] Compared with the prior art, the advantages of the present invention are: 1) Rapid response and effective isolation: through real-time monitoring by flame sensors and temperature sensors, once an abnormal situation is detected, the system can be quickly activated, and the airbags are ejected and inflated to form a physical isolation layer, effectively isolating the direct contact between the fire source and the battery pack, and preventing the fire from spreading;

[0011] 2) Multiple protections to improve safety: Combined with the sprinkler fire extinguishing system, on the basis of airbag isolation, water is sprayed toward the battery pack through the sprinkler nozzle to achieve double protection and further improve the fire extinguishing effect;

[0012] 3) High temperature resistant design and enhanced flame retardancy: The ceramic fiber cloth layer added inside the airbag can withstand high temperatures, ensuring good flame retardancy in extreme conditions and protecting the battery pack and surrounding structures.

[0013] 4) Simple structure and easy installation: The system has a compact structure and is easy to install. It can be flexibly adapted to different types of electric vehicle battery packs and has good versatility and practicality.

[0014] Furthermore, a hook is provided on the outside of the airbag, and the hook is used to connect with the airbag bracket to achieve the position limitation of the airbag in the airbag bracket, thereby improving the position wrapping of the battery pack.

[0015] Furthermore, a layer of ceramic fiber cloth is added to the inside of the airbag. The ceramic fiber cloth can withstand high temperatures of ℃. That is, the two outer layers are used as the airbag, and an additional layer is added inside to connect the bottom of the airbag, and the top is connected to the airbag bracket at high temperatures. When the airbag is ejected, the ceramic fiber cloth is driven down to ensure high-temperature fire resistance and improve the flame retardant effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the patent of the present invention in a top view.

[0017] Figure 2 It is a schematic diagram of the side structure of the patent of this invention.

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the patent of the present invention.

[0019] Figure 4 It is a schematic diagram of the structure of the enlarged area A.

[0020] Figure 5 It is a schematic diagram of the structure of the enlarged area B.

[0021] As shown in the figure: 1. airbag bracket, 2. airbag, 201. ceramic fiber cloth, 3. spray nozzle, 301. spray pipeline, 4. battery pack, 5. flame sensor, 6. temperature sensor. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] like Figures 1 to 5 As shown, the parts of this product include:

[0025] 1) Airbag bracket 1: The airbag bracket 1 is a solid rectangular frame structure made of lightweight and high-strength materials such as aluminum alloy or stainless steel. It is designed with multiple mounting holes so that it can be fixedly connected to the chassis of the electric vehicle or the battery pack frame by screws. As the supporting structure of the airbag 2, it ensures that the airbag can be stably supported and fixed in an emergency to prevent it from shifting or falling off. It is tightly connected to the chassis or battery pack frame of the electric vehicle by screws or other fastening devices.

[0026] 2) Airbag 2: Airbag 2 is made of multiple layers of high-strength, high-temperature resistant materials, and is filled with inert gas or designed with an inflatable structure. A hook is provided on the outside of the airbag for connecting to the airbag bracket 1, and a ceramic fiber cloth layer can be optionally provided inside to enhance high-temperature resistance. After receiving the work instruction, the airbag inflates rapidly to form a physical isolation layer to isolate the fire source from direct contact with the battery pack. At the same time, the ceramic fiber cloth layer provides additional fire-resistant protection. It is connected to the airbag bracket 1 through a hook to achieve limiting and fixation. The airbag gas generator and micro air pump inside the airbag are connected to the control unit through wires.

[0027] 3) Spray nozzle 3 and spray pipeline 301: The spray nozzle 3 is a small nozzle, which is evenly distributed on the top circle of the airbag bracket 1. The spray pipeline 301 adopts a branch pipe and main pipe design. The branch pipes are connected to each spray nozzle, and the main pipe is responsible for collecting and connecting to an external water supply source. After the airbag pops out, the quick connector in the spray pipeline 301 pops out automatically, which is convenient for external water supply. Subsequently, water is sprayed toward the battery pack through the spray nozzle to achieve fire extinguishing and cooling. The spray nozzle 3 is fixed to the airbag bracket 1 by threads or other fastening methods, and the spray pipeline 301 is connected by connectors such as pipe joints and quick connectors.

[0028] 4) Flame sensor 5 and temperature sensor 6: Small and sensitive sensors with high temperature resistance and anti-electromagnetic interference. They monitor the flame and temperature changes around the battery pack in real time. Once an abnormality is detected, they immediately send a signal to the control unit to trigger the safety protection system. They are connected to the control unit via wires or wirelessly, and are usually pasted or fixed to a suitable position near the airbag bracket 1 or the battery pack during installation.

[0029] Embodiment 2

[0030] Based on the first embodiment, Figures 1 to 5 As shown, the overall working principle is: when the flame sensor 5 or the temperature sensor 6 detects flames or abnormal high temperatures around the battery pack, a signal is immediately sent to the control unit. After receiving the signal, the control unit quickly sends a work instruction to the airbag gas generator, so that it controls the airbag 2 to eject and inflate to form a physical isolation layer. At the same time, the micro air pump starts and continuously inflates the airbag to ensure the stability and effectiveness of the isolation layer. At the same time as the airbag pops out, the quick connector in the spray pipeline 301 automatically pops out. After connecting to an external water supply source, water is sprayed in the direction of the battery pack through the spray nozzle 3 to extinguish the fire. The whole process achieves rapid response and effective control of battery pack fires. When the airbag pops out and inflates, the airbag contacts the ground to form a closed flame-retardant space, ensuring that the fire source does not extend, effectively controlling the range of the fire source and the fire extinguishing area, and increasing the chance of escape and fire extinguishing.

[0031] Embodiment 3

[0032] Based on the second embodiment, Figures 1 to 5As shown, during the production or modification of electric vehicles, an airbag bracket 1 of appropriate size is designed and manufactured according to the size and position of the battery pack. The airbag bracket 1 is fixed to the chassis of the electric vehicle or the battery pack frame by screws or other fastening devices. Subsequently, the airbag 2 is installed in the airbag bracket 1 through a hook, and the wires of the airbag gas generator and the micro air pump are connected. The spray nozzle 3 and the spray pipeline 301 are installed on the top circle of the frame of the airbag bracket 1, and it is ensured that the main pipe position of the spray pipeline 301 is convenient for external water supply. Finally, the flame sensor 5 and the temperature sensor 6 are pasted or fixed in a suitable position, and connected to the control unit by wire or wirelessly. After completing the above installation, the entire system is debugged and tested to ensure that it can work normally in an emergency.

[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fireproof safety airbag for an electric vehicle battery pack, characterized in that include: An airbag bracket (1), the airbag bracket (1) being a rectangular frame structure, the airbag bracket (1) being fixed around the battery pack (4) by means of screws, and an airbag (2) having a specification matching that of the battery pack (4) being installed in the airbag bracket (1); The airbag (2) has a battery pack (4) embedded in it. The airbag (2) also includes an airbag gas generator and an external micro air pump. The airbag gas generator controls the ejection of the airbag after receiving a working instruction, and the micro air pump works at the same time to inflate the airbag (2). A spray nozzle (3), wherein the spray nozzle (3) comprises a plurality of spray nozzles that are evenly arranged at a circle of the frame at the top of the airbag bracket (1), and the spray nozzles (3) are arranged in the direction of the battery pack (4); the spray nozzle (3) is connected to a matching spray pipeline (301), and the spray pipeline (301) adopts a branch pipe and a main pipe design, each branch pipe corresponds to a spray nozzle (3), and the plurality of branch pipes are connected to a main pipe. After the airbag (2) is inflated and ejected, the main pipe ejects a connected quick connector at the same time, and the quick connector is used to connect to an external water supply source; A flame sensor (5) and a temperature sensor (6), wherein the flame sensor (5) and the temperature sensor (6) are included in a plurality and are distributed on the airbag bracket (1), and monitor the use status of the battery pack (4) in real time, and send an alarm command to the airbag gas generator when flame and high temperature appear. After receiving the working command, the airbag gas generator controls the ejection of the airbag. When receiving the working command, the airbag gas generator sends a start command to the micro air pump, and the micro air pump then inflates the airbag (2).

2. A fireproof safety airbag for an electric vehicle battery pack according to claim 1, characterized in that: The airbag (2) is provided with a hook on the outside, and the hook is used to connect with the airbag bracket (1) to achieve the position limitation of the airbag (2) in the airbag bracket (1), thereby improving the position wrapping of the battery pack (4).

3. The fireproof safety airbag for an electric vehicle battery pack according to claim 1, characterized in that: A layer of ceramic fiber cloth is added to the inner side of the airbag (2), and the ceramic fiber cloth can withstand a high temperature of 1260° C. That is, the outer two layers make the airbag (2), and an inner layer is added, the bottom of which is connected to the bottom of the airbag (2), and the top is connected to the airbag bracket (1) in a high-temperature resistant manner. When the airbag (2) is ejected, the ceramic fiber cloth is driven down to ensure high-temperature fire resistance and improve the flame retardant effect.

Images