Exhaust pipe type anti-combustion battery pack for electric vehicle

Abstract

An exhaust pipe type anti-combustion battery pack for electric vehicles, comprising an exhaust pipe and a battery pack, characterized in that the battery pack is installed inside the exhaust pipe suspended under the vehicle chassis. The battery pack is divided into several tubular shapes, and each battery pack is packaged in a high-temperature resistant metal pipe. One end of the metal pipe is blocked, and the other end is open as a tail nozzle for discharging flames. The exhaust pipe is made of a bent pipe and the battery pack is installed inside. Both ends of the pipe mouth face the rear of the vehicle and become tail nozzles. When the battery burns, the flame is discharged from the tail nozzle to prevent the vehicle body from being ignited. The battery pack is divided into several small battery packs, and the combustion energy of the battery pack is low. The exhaust pipe is suspended under the chassis by aluminum alloy fasteners and can only withstand temperatures below 700 degrees. When the battery burns and the generated high temperature exceeds 700 degrees, the fasteners melt and the exhaust pipe swings backward, having a safety gap with the ground.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and specifically to a method for preventing battery combustion in an electric vehicle. Background Art

[0002] Most electric vehicles use lithium batteries. In recent years, with the booming sales of electric vehicles, battery combustion and explosion accidents have occurred frequently. Lithium-ion batteries are widely used due to their high energy density. However, lithium-ion batteries have poor high-temperature resistance and overcharge resistance, and often experience internal short circuits and fires caused by thermal runaway. In addition, since a large amount of active substances are contained inside lithium-ion batteries, once these active substances come into contact with air, violent chemical reactions will occur. Therefore, the accidental deflagration of lithium-ion batteries is their physical property. Preventing the battery deflagration of electric vehicles from endangering the passengers in the vehicle and burning the vehicle is an urgent problem in the new energy vehicle industry. Summary of the Invention

[0003] The purpose of the present invention is to provide an installation method for an exhaust pipe type anti-combustion battery pack of an electric vehicle to solve the technical problems of battery pack combustion and explosion.

[0004] Inspired by the Katyusha rocket launcher tube, its rocket launch will deflagrate, but the gun body and vehicle body remain intact.

[0005] The technical solution provided by the present invention is as follows:

[0006] 1. The electric vehicle battery pack is installed in the exhaust pipe to prevent the battery deflagration from igniting the vehicle body. The battery pack is installed in the exhaust pipe suspended under the vehicle chassis. There is a ventilation gap between the exhaust pipe and the vehicle chassis for heat dissipation and isolation of high temperature; only the exhaust pipe opening facing the rear of the vehicle is open. When the battery burns, the flame is discharged from the exhaust pipe tail nozzle to prevent the vehicle body from being ignited.

[0007] 2. The battery pack is divided into multiple strips, and each battery pack is packaged in a high-temperature-resistant metal tube. One end of the metal tube is blocked, and the other end is open as the tail nozzle for discharging and spraying the flame. The exhaust pipes are arranged at intervals, and the interval gaps are used for ventilation and heat dissipation.

[0008] 3. The exhaust pipe is made of a bent pipe into a U shape, and the two ends of the pipe mouth are both facing the rear of the vehicle to form the tail nozzle; the U-shaped elbow faces the front of the vehicle, and the wind resistance coefficient is low; the middle gap of the U-shaped bend is conducive to ventilation and heat dissipation.

[0009] 4. The exhaust pipe is made of steel and can withstand a high temperature of about 1500 degrees. Further, the exhaust pipe fixing member is made of aluminum alloy, which can only withstand a low temperature of about 600 degrees. When the battery burns, the aluminum alloy member is quickly melted, causing the exhaust pipe to break away from the vehicle body.

[0010] The aluminum alloy hanging parts of the present invention do not limit the structural form, and only play a role when the battery burns and the fasteners fail. Under the action of the swing hook, the exhaust pipe moves downward and backward, and the tail nozzle moves away from the vehicle body. The exhaust pipe remains above the ground and has a safety gap from the ground. The exhaust pipe is hoisted under the chassis by fasteners, and the fasteners can only withstand temperatures below 700 degrees. When the battery burns and the generated high temperature exceeds 700 degrees, the fasteners melt and the exhaust pipe swings away from the vehicle body.

[0011] Under the action of the swing hook, when the battery burns and the generated high temperature exceeds 700 degrees, the fasteners melt, the exhaust pipe swings away from the vehicle body, is suspended above the ground, and has a safety gap from the ground.

[0012] V. The exhaust pipe is fixed under the chassis by fasteners. Further, the fasteners of the exhaust port are made of aluminum alloy. The exhaust pipe is hoisted under the chassis by a swing hook and fasteners. The fasteners can only withstand temperatures below 700 degrees. When the battery burns and the generated high temperature exceeds 700 degrees, all the fasteners on the exhaust pipe melt, and the exhaust pipe swings away from the vehicle body, is suspended above the ground, and has a safety gap from the ground.

[0013] VI. The exhaust pipe is fixed under the chassis by fasteners, and several fasteners are used to control two states of effective fastening or failure.

[0014] Further, when the high temperature generated by the battery burning causes the fasteners to fail, the exhaust pipe swings away from the vehicle body.

[0015] The vehicle body refers to the part that does not include the battery pack and the exhaust pipe and needs to be protected from combustion.

[0016] The battery pack refers to a combustible component installed outside the vehicle body. The exhaust pipe refers to the one that is installed outside the vehicle body by a swing hook and fasteners for battery fire prevention and isolation.

[0017] A display is set at the exhaust pipe opening to display the performance of the battery pack. It can also replace the taillight and serve as a flashing warning taillight during driving, making the electric vehicle, like an F1 racing car, have a row of taillights to enhance the driving dynamics and increase the aesthetic degree.

[0018] The wire connecting the vehicle body and the battery pack is an aluminum wire. When the battery burns and generates a high temperature above 700 degrees, the aluminum wire can be melted.

[0019] The plural exhaust pipes are like piano keys, and each exhaust pipe is independently suspended; when any group of batteries burns, the exhaust pipe detaches from the vehicle body and leaves the intact battery pack, effectively preventing a group of batteries from burning and affecting the total battery pack.

[0020] The application of the swing hook on the vehicle body chassis can ensure that when the battery burns, the exhaust pipe swings away from the vehicle body, and also avoids the illegal situation of throwing objects on the highway.

[0021] The temperature difference resistance between the steel pipe and the aluminum alloy, two metal materials, reaches 900 degrees. For the convenience of description, it is assumed that 700 degrees is set as the critical point; that is, when the temperature is higher than 700 degrees, the fasteners made of aluminum alloy melt, and the aluminum wires melt; while the steel exhaust pipe and the swing hook do not melt at 700 - 1500 degrees.

[0022] The present invention has the following beneficial effects:

[0023] 1. When the battery burns, the flame is discharged from the tail nozzle of the exhaust pipe, preventing the body from being ignited;

[0024] 2. When the battery burns, the corresponding single exhaust pipe detaches from the body and the total battery pack;

[0025] 3. After the large-capacity battery pack is divided into several small-capacity battery packs, the combustion energy is low;

[0026] 4. After the large-capacity battery pack is divided into several small-capacity battery packs, the heat dissipation effect is good;

[0027] 5. The battery pack is hoisted under the chassis, with a low center of gravity, making the vehicle handling performance good;

[0028] 6. The exhaust pipe is fixed under the chassis by several fasteners and can swing away from the body during combustion. Description of the Drawings

[0029] Figure 1 It is a schematic diagram of the hoisting structure of the first embodiment of the anti-combustion battery pack of the exhaust pipe type electric vehicle of the present invention;

[0030] Figure 2 It is a three-dimensional structure schematic diagram of a plurality of exhaust pipes of the first embodiment of the anti-combustion battery pack of the exhaust pipe type electric vehicle of the present invention;

[0031] Figure 3 It is a schematic diagram of the U-shaped bent pipe structure of the exhaust pipe of the second embodiment of the anti-combustion battery pack of the exhaust pipe type electric vehicle of the present invention;

[0032] Figure 4 It is a schematic diagram of the exhaust pipe port display of the third embodiment of the anti-combustion battery pack of the exhaust pipe type electric vehicle of the present invention;

[0033] Figure 5 It is a partial hoisting schematic diagram of the connection between the exhaust pipe and the chassis of the exhaust pipe type electric vehicle of the present invention.

[0034] In the figure: 1. Battery pack; 2. Exhaust pipe; 3. Tail nozzle; 4. Chassis; 5. Swing hook; 6. Fastener; 8. Air duct; 9. Display. Detailed Embodiments

[0035] The technical solution of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention:

[0036] Embodiment 1: As shown Figure 1 in the figure, the exhaust pipe (2) of the present invention is made of steel pipe, which can withstand high temperature of about 1500 degrees. A battery pack (1) is installed inside. The pipe orifice facing the front of the vehicle is blocked, and the pipe orifice facing the rear of the vehicle serves as the tail nozzle (3). The exhaust pipe (2) is combined with a swing hook (5) and a fastener (6) and hoisted under the vehicle chassis (4). A ventilation gap is left between the exhaust pipe (2) and the chassis (4) for heat dissipation and high temperature isolation. When the battery burns, the flame exceeding 700 degrees melts the fastener (6), and the exhaust pipe (2) swings towards the rear side of the vehicle under the action of the swing hook (5), and the flame is ejected from the tail nozzle (3).

[0037] Embodiment 2: As shown Figure 2 in the figure, the battery pack (1) is divided into a plurality of strips and installed in the corresponding plurality of exhaust pipes (2) respectively. The exhaust pipe (2) is made of a high-temperature resistant metal pipe. One end of the metal pipe is blocked, and the other end is open and serves as the tail nozzle (3) for discharging the flame. The plurality of exhaust pipes (2) are arranged in parallel with an interval space, and the interval gap is used for heat dissipation of the ventilation duct (8).

[0038] Embodiment 3: As shown Figures 3-4 in the figure, the exhaust pipe (2) is bent into a U shape by a pipe, and the battery pack (1) is installed inside. Both ends of the pipe orifice face the rear of the vehicle body and become the tail nozzles (3). A plurality of exhaust pipes (2) are arranged under the vehicle chassis (4). When the battery burns, the high temperature generated melts the low-temperature resistant components, causing the corresponding exhaust pipe (2) to swing towards the rear of the vehicle body, and the orifice of the exhaust pipe (2) is far away from the vehicle body.

[0039] As shown Figure 5 in the figure, further, the exhaust pipe (2) is hung under the chassis (4) by a swing hook (5) and has a safety gap from the ground; the exhaust pipe (2) is fixed under the chassis (4) by a fastener (6).

[0040] The exhaust pipe (2) is fixed under the chassis by a fastener (6), and several fasteners (6) are in two states of being effectively fastened or ineffective.

[0041] Further, when several fasteners (6) are effectively fastened, when the battery burns, the fasteners (6) on the exhaust pipe (2) fail and break away, causing the exhaust pipe (2) to swing away from the vehicle body. The aluminum alloy generally refers to materials with a temperature resistance lower than 700 degrees, such as magnesium alloy, and is not limited to aluminum alloy.

[0042] As shown Figure 4 in the figure, a display (9) is arranged at the exhaust pipe orifice for displaying the performance of the battery pack or serving as a tail light. The display (9) can be an LED or a bulb.

Claims

1. An exhaust pipe type anti-combustion battery pack for electric vehicles, comprising an exhaust pipe and a battery pack, characterized in that the exhaust pipe is hoisted under the chassis by a fastener swing hook, and the battery pack is installed inside the exhaust pipe. Only the exhaust pipe nozzle facing the rear of the vehicle is open. When the battery burns, the fastener fails, the exhaust pipe swings downward and backward, and the tail nozzle moves away from the vehicle body.

2. The exhaust pipe type electric vehicle anti-combustion battery pack according to claim 1, wherein A ventilation gap is left between the exhaust pipe and the vehicle chassis for heat dissipation and high temperature isolation, and the fastener can only withstand temperatures below 700 degrees.

3. The exhaust pipe type anti-combustion battery pack for electric vehicles according to claim 1, characterized in that, The exhaust pipe is U-shaped, and the nozzles at both ends face the rear of the vehicle and become tail nozzles.

4. The exhaust pipe type electric vehicle anti-combustion battery pack according to claim 1, characterized in that, There are multiple exhaust pipes, and each exhaust pipe is independently suspended; when any group of batteries burns, the exhaust pipe detaches from the vehicle body.

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