CN112959890A

CN112959890A - Electric automobile collision fast power-off device

Info

Publication number: CN112959890A
Application number: CN202110329334.3A
Authority: CN
Inventors: 吕科成; 宫庆伟; 王明东; 王�琦
Original assignee: Dayun Automobile Co Ltd
Current assignee: Dayun Automobile Co Ltd
Priority date: 2021-03-28
Filing date: 2021-03-28
Publication date: 2021-06-15

Abstract

The invention relates to the technical field of electric automobiles, in particular to a collision rapid power-off device for an electric automobile, and aims to solve the technical problem that the power-off of equipment for cutting off high voltage electricity of the existing electric automobile is slow. The following technical scheme is adopted: including covering the ceramic package body in the fuse outside, be equipped with TNT explosive and ignition in the ceramic package body, the TNT explosive is adjacent with the fuse, ignition is adjacent with the TNT explosive, and ignition one end ground connection, the other end are connected with the switch block through the lead wire electricity, the switch block is placed in the ceramic package body outside, the switch block is parallelly connected by a plurality of collision switch and forms, and a plurality of collision switch equipartitions are on electric automobile's front bumper and rear bumper, and switch block electricity is connected with control power supply, control power supply not with the one end ground connection of switch block connection.

Description

Electric automobile collision fast power-off device

Technical Field

The invention relates to the technical field of electric automobiles, in particular to a collision rapid power-off device for an electric automobile.

Background

Along with the research, development and production of electric vehicles in the global scope, the sales volume of the electric vehicles is gradually increased, and the application range is increasingly wide. The power system of the electric automobile comprises a driving motor and a controller for driving the electric automobile to move forward, and a high-voltage circuit (power battery) for driving the motor to be powered and operated. The high-voltage circuit is generally provided with a fuse for breaking to protect when the current is overloaded. Because the electric automobile is inevitable to collide when driving, and the high-voltage electric insulation layer can be damaged by serious collision, so that the dangers of electric leakage and the like are caused, a power-off device is required to be arranged on the electric automobile and used for rapidly cutting off the high-voltage electricity when colliding.

At present, the device for cutting off high-voltage electricity in the running of an electric automobile detects the state of the automobile through an acceleration sensor, when the automobile is detected to be collided and vibrated, a power network is controlled to cut off a high-voltage power supply, the process is that a high-voltage system is cut off after the collision and vibration occurs, the high-voltage system is subjected to great vibration impact before the high voltage is cut off, and the danger of high-voltage explosion and electric shock occurs before the high voltage is cut off or when the high voltage is cut off.

Disclosure of Invention

The invention aims to solve the technical problem that the power failure of the existing electric automobile for cutting off high-voltage power equipment is slow. Therefore, the invention provides a rapid power-off device for collision of an electric automobile.

The technical scheme adopted by the invention for solving the technical problems is as follows:

electric automobile collision fast power-off device, including covering the ceramic package body in the fuse outside, be equipped with TNT explosive and ignition in the ceramic package body, the TNT explosive is adjacent with the fuse, ignition is adjacent with the TNT explosive, and ignition one end ground connection, the other end are connected with the switch block through the lead wire electricity, the switch block is placed in the ceramic package body outside, the switch block is parallelly connected by a plurality of collision switch and forms (a plurality of collision switch are parallelly connected, guarantee that arbitrary one collision switch receives the striking closure and can make the ignition switch-on), a plurality of collision switch equipartitions are on electric automobile's front bumper and rear bumper (guarantee no matter which position of front bumper and rear bumper takes place the striking, all can trigger the collision switch), and the switch block electricity is connected with control power supply, control power supply is not with switch block connection's one end ground connection. When the automobile collides, at least one collision switch positioned on the front bumper or the rear bumper is pressed to be closed, the control power supply is communicated with the ignition device, the ignition device ignites the TNT explosive, and the TNT explosive fuses the fuse to cut off the high-voltage electric loop.

The invention has the beneficial effects that:

according to the electric automobile collision rapid power-off device provided by the invention, the collision switches are arranged on the front bumper and the rear bumper of the electric automobile, the collision switches are directly connected to the connecting line of the ignition device and are closed when the automobile is collided, so that the ignition device is started to detonate TNT explosive to generate a high-temperature fusing fuse, and a high-voltage loop is cut off. The power failure is timely, a collision signal does not need to be sent, the information transmission link and disastrous dangers such as short circuit, electric shock, explosion and the like caused by power failure time delay are avoided, and the personal safety of drivers is ensured.

Drawings

FIG. 1 is a schematic diagram of the fast power-off device of the present invention (without the switch set and the control power supply);

FIG. 2 is a schematic view of the structure of the crash switch of the present invention;

FIG. 3 is a view showing the arrangement of the switch block of the present invention on the front bumper of the vehicle;

FIG. 4 is a side view of the crash switch mounting structure of the present invention;

FIG. 5 is a schematic circuit diagram of the quick disconnect of the present invention in a non-crash condition;

fig. 6 is a schematic circuit diagram of the quick power-off device of the present invention in a collision state.

In the figure:

1-a fuse; 2, a ceramic package; 3-TNT explosive; 4, an ignition device; 5, a switch group; 5-1 to a collision switch; 6, controlling a power supply; 7-an air escape valve; 8-plastic shell; 9-a bumper beam; 10 to a bumper housing; 11-a drive motor; 12 to air conditioning.

Detailed Description

Referring to fig. 1 to 4, the electric vehicle collision fast power-off device comprises a ceramic packaging body 2 covering the outer side of a fuse 1, wherein a TNT explosive 3 and an ignition device 4 are arranged in the ceramic packaging body 2, the TNT explosive 3 is adjacent to the fuse 1, the ignition device 4 is adjacent to the TNT explosive 3, one end of the ignition device 4 is grounded, the other end of the ignition device 4 is electrically connected with a switch group 5 through a lead, the switch group 5 is arranged on the outer side of the ceramic packaging body 2, the switch group 5 is formed by connecting a plurality of collision switches 5-1 in parallel, the collision switches 5-1 are uniformly distributed on a front bumper and a rear bumper of an electric vehicle, the switch group 5 is electrically connected with a control power supply 6, and one end of the control power supply 6, which is not connected with the switch group 5, is. When an automobile collides, at least one collision switch 5-1 on a front bumper or a rear bumper is pressed to be closed, a control power supply 6 is communicated with an ignition device 4, the ignition device 4 ignites a TNT explosive 3, and the TNT explosive 3 fuses the fuse 1 to cut off a high-voltage electric circuit.

Further, an air release valve 7 is arranged on the ceramic packaging body 2. After the TNT explosive 3 explodes, the air pressure in the ceramic packaging body 2 is high, and the air release valve 7 is used for releasing pressure, so that the safety is ensured.

Further, a plastic shell 8 is arranged on the outer side of the ceramic packaging body 2, the switch group 5 is arranged on the outer side of the plastic shell 8, and the plastic shell 8 plays a role in heat insulation.

Referring to fig. 3 and 4, the bumper of the vehicle includes a bumper beam 9 and a bumper 10, and the impact switch 5-1 is mounted on the bumper beam 9 between the bumper beam 9 and the bumper housing 10.

Referring to fig. 5 and 6, the high-voltage circuit includes two battery managers 13 and two high-voltage power supplies 14 in addition to the fuse 1, and the two battery managers 13 are grounded. The two battery managers 13, the two high-voltage power supplies 14, the fuse 1, and the ground form a high-voltage circuit, and the drive motor 11, the air conditioner 12, and the like are connected in parallel to the high-voltage circuit. The ignition device 4, the switch group 5, the control power supply 6 and the ground form a low-voltage loop.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. Electric automobile collision quick power-off device, its characterized in that: including covering in ceramic package (2) in fuse (1) outside, be equipped with TNT explosive (3) and ignition (4) in ceramic package (2), TNT explosive (3) are adjacent with fuse (1), ignition (4) are adjacent with TNT explosive (3), and ignition (4) one end ground connection, the other end are connected with switch block (5) through the lead wire electricity, ceramic package (2) outside is arranged in switch block (5), switch block (5) are formed by connecting in parallel a plurality of collision switch (5-1), and a plurality of collision switch (5-1) equipartitions are on electric automobile's front bumper and rear bumper, and switch block (5) electricity is connected with control power supply (6), control power supply (6) are not with the one end ground connection that switch block (5) are connected.

2. The electric vehicle collision fast power-off device according to claim 1, characterized in that: and the ceramic packaging body (2) is provided with an air escape valve (7).

3. The electric automobile collision fast power-off device according to any one of claims 1-2, characterized in that: a plastic shell (8) is arranged on the outer side of the ceramic packaging body (2), and the switch group (5) is arranged on the outer side of the plastic shell (8).