New energy vehicle collision disconnects high voltage electric control device

Abstract

The utility model discloses a new energy automobile collision disconnects high -voltage electric control device relates to new energy automobile circuit safety management field. This new energy automobile collision disconnects high -voltage electric control device, including collision sensor, air bag controller, battery management system, intelligent fuse and the wiring harness connection between them. This new energy automobile collision disconnects high -voltage electric control device, when the actual collision of new energy automobile, collision sensor detects this collision acceleration and sends air bag controller, then through two collision signal transmission to battery management system, and battery management system drives intelligent fuse to execute point explosion disconnects high -voltage electricity, because the action time of point explosion intelligent fuse is faster than the action time of disconnecting relay, and the intelligent fuse does not have the defect of relay sticking, not only has shortened the new energy automobile collision disconnects high -voltage electricity time, and avoided the risk that relay sticking can not disconnect high -voltage electricity.

Description

Technical Field

[0001] This utility model relates to the field of circuit safety management technology for new energy vehicles, specifically a high-voltage electrical disconnection control device for new energy vehicles in the event of a collision. Background Technology

[0002] As the penetration rate of new energy vehicles increases and the number of new energy vehicles grows, the possibility of collisions with new energy vehicles also increases. In order to avoid the risk of electric shock to people during a collision, it is necessary to disconnect the high voltage power when a new energy vehicle is involved in a collision.

[0003] However, the solutions proposed in the existing published patents, including CN117656843A, CN114604137A and CN214138249U, for disconnecting high-voltage circuits during car collisions are all achieved by disconnecting relays to disconnect high-voltage electricity.

[0004] However, in actual use, when a car is involved in a collision, the relay is prone to sticking and failing to disconnect the high voltage. At the same time, as a circuit component with a low response speed, the relay is prone to being damaged and losing its disconnecting function before the collision occurs, which can lead to an open circuit in the high voltage circuit and cause more serious safety accidents. Therefore, a high voltage disconnection control device for new energy vehicles is provided. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a high-voltage electrical disconnection control device for new energy vehicles in the event of a collision. This solves the problems of existing new energy vehicles, which typically use relays as a means of disconnecting high-voltage circuits. In the event of a collision, the relays are prone to sticking together and failing to disconnect the high-voltage electricity. At the same time, the relays have a slow response speed, and at the moment of the collision, the relay body is easily damaged and loses its disconnection function before the collision has completed the circuit disconnection.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage circuit disconnection control device for new energy vehicles in collision, comprising a triggering unit and an execution unit. The triggering unit is used to collect vehicle collision information. The triggering unit and the execution unit are communicatively connected. The execution unit is an intelligent fuse. The intelligent fuse is installed in the high-voltage circuit of the vehicle and achieves rapid and effective disconnection of the high-voltage circuit through internal melting.

[0007] Preferably, the triggering unit includes a collision sensor, which is used to monitor the occurrence of a collision.

[0008] Preferably, the triggering unit further includes an airbag controller, which is communicatively connected to a collision sensor. The airbag controller sends a collision signal based on the information monitored by the collision sensor, and is also connected to a smart fuse control.

[0009] Preferably, the airbag controller and the smart fuse are connected via a battery management system.

[0010] Preferably, a signal transmission line is installed between the airbag controller and the battery management system.

[0011] Preferably, the signal transmission line includes a CAN signal transmission line and a PWM signal transmission line. The CAN signal transmission line is used to transmit CAN signals, and the PWM signal transmission line is used to transmit PWM signals, realizing a dual signal transmission channel, which is safer and more reliable, and avoids the situation where a single transmission circuit failure causes the fuse to fail to blow normally.

[0012] Preferably, the intelligent fuse adopts a point-explosion type fuse.

[0013] Preferably, the collision sensor is a mechanical collision sensor or an electronic collision sensor.

[0014] This utility model discloses a high-voltage disconnection control device for new energy vehicles in collisions, which has the following advantages: Addressing the shortcomings of existing technologies that disconnect high-voltage electricity by using relays, which suffer from long relay disconnection times and relay sticking leading to failure to disconnect the high-voltage electricity, this utility model proposes a high-voltage disconnection control device for new energy vehicles in collisions. This device not only shortens the high-voltage disconnection time in collisions but also eliminates the problem of relay sticking, reliably disconnecting the high-voltage electricity. Furthermore, this device disconnects the high-voltage electricity by using a detonating intelligent fuse, which has the advantage of a faster detonation action time than the relay disconnection time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure connection of this utility model;

[0017] Figure 2 This utility model is applied to the vehicle circuit operating condition diagram. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] This application provides a high-voltage disconnection control device for new energy vehicles in the event of a collision. This solves the problems of existing new energy vehicles, which typically use relays to disconnect high-voltage circuits. In the event of a collision, the relays are prone to sticking together and failing to disconnect the high-voltage electricity. At the same time, the relays have a slow response speed, and at the moment of the collision, the relay body is easily damaged and loses its disconnection function before the collision has completed the circuit disconnection.

[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0021] This utility model discloses a high-voltage electrical control device for disconnecting during collisions in new energy vehicles.

[0022] Example 1

[0023] According to the appendix Figure 1-2 As shown, it includes a triggering unit and an execution unit. The triggering unit is used to collect vehicle collision information. The triggering unit and the execution unit are connected in communication. The execution unit is a smart fuse. The smart fuse is a point-explosion type fuse. The smart fuse is installed in the vehicle's high-voltage circuit and achieves rapid and effective disconnection of the high-voltage circuit through internal melting.

[0024] The triggering unit includes a collision sensor and an airbag controller. The collision sensor is used to monitor the occurrence of a collision. The collision sensor can be a mechanical or electronic collision sensor. The airbag controller is connected to the collision sensor and sends a collision signal based on the information monitored by the collision sensor. The airbag controller is also connected to the smart fuse control.

[0025] The airbag controller and the smart fuse are connected via a battery management system, and a signal transmission line is installed between the airbag controller and the battery management system.

[0026] The signal transmission lines include CAN signal transmission lines and PWM signal transmission lines. The CAN signal transmission line is used to transmit CAN signals, and the PWM signal transmission line is used to transmit PWM signals, realizing dual signal transmission channels, which is safer and more reliable, and avoids the situation where a single transmission circuit failure causes the smart fuse to fail to blow normally.

[0027] Working principle: The device consists of a collision sensor, an airbag controller, a battery management system, a smart fuse, and wiring harnesses connecting them. The collision sensor is connected to the airbag controller to receive acceleration signals from the collision sensor. The airbag controller is connected to the battery management system via two wiring harnesses: one for transmitting CAN signals and the other for transmitting PWM hardwire signals. These two wiring harnesses are used by the battery management system to receive collision signals. The smart fuse is connected to the battery management system to receive drive signals from the battery management system, thereby detonating the smart fuse.

[0028] When a new energy vehicle experiences an actual collision, the collision sensor detects the collision acceleration and sends it to the airbag controller. The airbag controller then receives the collision acceleration, analyzes and processes it, and upon confirmation of the collision, immediately sends two collision signals: one CAN signal and one PWM hardwired signal to the battery management system. Next, upon receiving the collision signal, the battery management system immediately sends a drive signal to the smart fuse. Finally, the smart fuse, upon receiving the drive signal, detonates to disconnect the high-voltage electricity. Because the smart fuse's detonation time is faster than that of a relay, and because the smart fuse does not suffer from relay adhesion defects, this solution not only shortens the time for disconnecting high-voltage electricity in a new energy vehicle collision but also avoids the risk of relay adhesion preventing the disconnection of high-voltage electricity, thus improving the reliability and safety of high-voltage electricity disconnection in a vehicle collision.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-voltage disconnection control device for new energy vehicles in the event of a collision, comprising a triggering unit and an execution unit, characterized in that, The triggering unit is used to collect vehicle collision information. The triggering unit and the execution unit are communicatively connected. The execution unit is a smart fuse. The smart fuse is installed in the vehicle's high-voltage circuit and achieves rapid and effective disconnection of the high-voltage circuit through internal melting. The triggering unit includes a collision sensor, which is used to monitor the occurrence of a collision. The triggering unit also includes an airbag controller, which is communicatively connected to a collision sensor. The airbag controller sends a collision signal based on the information monitored by the collision sensor, and is also connected to a smart fuse control.

2. The high-voltage electrical disconnection control device for new energy vehicles according to claim 1, characterized in that: The airbag controller and the smart fuse are connected via a battery management system.

3. The high-voltage electrical disconnection control device for new energy vehicles according to claim 2, characterized in that: A signal transmission line is installed between the airbag controller and the battery management system.

4. The high-voltage disconnection control device for new energy vehicles according to claim 3, characterized in that: The signal transmission line includes a CAN signal transmission line, which is used to transmit CAN signals.

5. A new energy vehicle collision disconnection high-voltage electrical control device according to claim 3, characterized in that: The signal transmission line also includes a PWM signal transmission line, which is used to transmit PWM signals.

6. The high-voltage disconnection control device for new energy vehicles according to claim 1, characterized in that: The collision sensor is a mechanical collision sensor.

7. A new energy vehicle collision disconnection high-voltage power control device according to claim 1, characterized in that: The collision sensor is an electronic collision sensor.

Images