A vehicle-mounted emergency power-off device

Abstract

The application discloses a kind of vehicle-mounted emergency power-off device, belong to vehicle safety protection technical field.Device is in the interior trim area of driver easy operation, normally closed self-locking switch is connected through hard wiring series vehicle low-voltage power control loop, without vehicle ECU transfer in cut-off process, 0.3s is completed low-voltage loop cut-off;New energy vehicle type only cut off high-voltage contactor low-voltage loop, indirectly shut down power battery high-voltage, no high-voltage contact risk.Switch pressing area integrates double-color LED, red unit power-off alarm, white unit wide light is linked to show night backlight;Support original factory prefabricated panel preloading, original interior trim hole modification, supporting IP65 waterproof structure and exempt from broken line quick connector.The application solves the industry pain points that existing power-off device relies on electronic control, vehicle type adaptation is single, modification difficulty is big, and structure integration degree is high, safety performance is excellent, and can be used for new car front loading, stock vehicle safety upgrading modification.

Description

Technical Field

[0001] This invention discloses an on-board emergency power-off device, belonging to the technical field of vehicle safety protection equipment. In particular, it relates to an on-board emergency power-off device that can be retrofitted and does not require a hard cut-off of the low-voltage control circuit via the vehicle's ECU. It is applicable to all types of motor vehicles, including pure electric, hybrid, and fuel-powered vehicles. Background Technology

[0002] In emergency situations such as vehicle collisions, smoke, spontaneous combustion, or loss of control, quickly cutting off the power supply is the core means of avoiding the risk of fire and explosion. Existing vehicle power-off devices on the market all rely on the vehicle's ECU (Electronic Control Unit) as a trigger. Once the vehicle is flooded, the ECU is damaged in a collision, or the control wiring harness is broken, the power-off function directly fails, posing a significant safety hazard. Furthermore, existing products are only compatible with single-energy vehicle models; new energy and gasoline vehicles require separate designs, resulting in high production costs. They can only be matched with interior trim with pre-existing openings, requiring extensive disassembly of the interior for retrofitting existing vehicles, making modifications difficult and potentially damaging to the original vehicle. Currently, there is no equipment that simultaneously solves the three core defects of reliance on electronic control, poor vehicle compatibility, and limited retrofitting capabilities. Summary of the Invention Purpose of the invention

[0003] To address the shortcomings of existing technologies, this invention provides an on-board emergency power-off device that eliminates the need for a vehicle ECU and directly cuts off the low-voltage control circuit via hard wiring, resulting in a fast response time. The device is compatible with gasoline, hybrid, and new energy vehicles; for new energy vehicles, only the low-voltage circuit of the high-voltage contactor is cut off, eliminating the risk of high-voltage electric shock. It supports pre-installation at the factory and on-site modification via drilling into the original vehicle interior, significantly lowering the barrier to vehicle safety upgrades and modifications. Technical solution

[0004] An on-board emergency power cut-off device includes a mounting carrier, a normally closed self-locking power cut-off switch, an output control wiring harness, and a dual-color LED lamp body. The mounting carrier is located in an interior area where the driver can operate it without releasing the steering wheel, and the carrier has a switch mounting position. The normally closed self-locking power cut-off switch is fixed in the mounting position, with the normally closed circuit being conductive, a single press locking off the power, and a second press resetting the circuit to be conductive. The output control wiring is hard-wired in series with the vehicle's low-voltage power control circuit, and the cut-off action does not pass through the ECU.

[0005] The installation carriers are available in two types: prefabricated perforated decorative panels and original vehicle interior panels without perforations. For the interior panels without perforations, a hole saw can be used to fabricate the installation position on-site. Threaded locking components secure the switch from the back of the interior panel, adapting to 1mm-15mm thick materials, ensuring stability even during bumpy driving. The switch pressing area integrates a dual-color LED light body with two independent light-emitting units: a red unit connected in parallel to the switch contacts, providing a constant red light as an alarm when power is off; and a white unit linked to the vehicle's side marker lights, providing a constant white light at night for easy switch positioning. The two light sources are independently controlled. The output control lines are vehicle-specific: for new energy vehicles, they connect to the low-voltage control circuit of the high-voltage contactor, indirectly shutting off the high-voltage power battery when the low-voltage signal is cut off; for gasoline vehicles, they connect to the low-voltage power supply circuit of the fuel pump and ignition coil to cut off power. A waterproof seal is installed between the switch and the carrier, providing an overall IP65 protection rating. The wiring harness ends are equipped with quick-connect connectors that do not require wire cutting, allowing for non-destructive connection to the original vehicle wiring harness. The switch cut-off response is ≤0.3s, the operating temperature range is -40℃ to 85℃, and it can withstand 10,000 consecutive presses without failure. Beneficial effects

[0006] It adopts an ECU-free hard cut-off architecture, completely avoiding the risk of power failure due to electronic control failure, and the cut-off speed is far superior to the national standard requirements; it only controls the low-voltage circuit of the vehicle, and no high-voltage operation qualification is required for the modification of new energy vehicles, which greatly improves the safety of the modification. A universal structure for all energy vehicles, with one device adaptable to the high and low voltage control circuits of fuel, hybrid, and pure electric vehicles, reducing manufacturers' development and inventory costs; Dual installation modes are compatible with existing vehicles. Original prefabricated panels can be directly installed, and original interior interior can be modified by drilling holes on site. No large-scale disassembly of the interior is required, resulting in high modification efficiency. The integrated dual-color LED integrates dual lighting functions, achieving power failure alarm and nighttime positioning in the same structure. It features a simplified structure and high integration. It is equipped with IP65 waterproof and non-destructive quick-connect connectors, making it suitable for complex and harsh automotive operating conditions. With a wide temperature range and high durability structural design, it meets the standards for long-term vehicle use and has outstanding substantive features and significant safety improvement effects. Attached Figure Description

[0007] Figure 1. Schematic diagram of the overall assembly cross-sectional structure of the present invention. Figure 2. Schematic diagram of the low-voltage control circuit adapted to new energy vehicles according to the present invention. Figure 3. Schematic diagram of the power circuit connection principle for fuel vehicles according to the present invention. Explanation of reference numerals in the attached diagram: 1 - Mounting carrier, 2 - Normally closed self-locking power cut-off switch, 3 - Threaded locking element, 4 - On / off status feedback element (dual-color LED red light-emitting unit), 5 - Sealed waterproof element, 6 - Output control wiring harness, 7 - Quick-connect connector without wire breaking, 8 - LED backlight (dual-color LED white light-emitting unit); 4 and 8 are integrated into the same dual-color LED lamp body, and their physical installation positions overlap, so only one LED structure is shown in the attached diagram. Detailed Implementation

[0008] An on-board emergency power-off device, Example 1: A retrofit scheme for a new energy pure electric vehicle, as shown in Figures 1 and 2, includes an installation carrier 1, a normally closed self-locking power cut-off switch 2, a threaded locking component 3, a dual-color LED light body, a sealed waterproof component 5, an output control wiring group 6, and a quick-connect connector without wire cutting 7. The installation carrier is the original interior panel of the center console, with a φ22mm hole saw used to create the switch mounting position on-site. The switch is embedded from the front of the panel, and the threaded locking component on the back is tightened for fixation. An IP65 sealed waterproof component is fitted over the gap. The dual-color LED is integrated into the switch's pressing end face. The internal red light-emitting unit is connected in parallel to the switch contacts; the red light is off when the vehicle is driving normally. When the switch is pressed in an emergency, the low-voltage control circuit self-locks and disconnects, the high-voltage contactor loses power and cuts off the high voltage of the power battery, and the red light remains constantly on as an alarm. The white light-emitting unit is linked to the vehicle's side marker lights and automatically illuminates at night. The output control wiring harness is a standard automotive low-voltage wiring harness. It connects the low-voltage control circuit of the main contactor of the power battery in series without damage via a quick-connect connector, without requiring modification to the original high-voltage main wiring. After repair, simply press the switch twice to reset.

[0009] Example 2: The modification scheme for a fuel-powered passenger vehicle is shown in Figures 1 and 3. The installation carrier is the interior door panel. Since there are no pre-drilled holes in the original vehicle, holes can be drilled on-site for assembly. The output control wiring group is connected in series with the low-voltage circuit for power supply to the fuel pump. When the switch is pressed, the fuel pump is de-energized, and the engine immediately stops outputting power. The dual-color LED lights, waterproofing, and locking structure are completely consistent with Example 1.

[0010] Example 3: Original Factory Prefabricated Panel Pre-installation Solution. The vehicle comes with a prefabricated perforated decorative panel as the installation carrier, eliminating the need for on-site drilling. The switch is directly embedded and locked, and the circuit, lighting, and protective structure are the same as in Example 1.

[0011] The device has a switch-off response time of ≤0.3s, operates stably in environments ranging from -40℃ to 85℃, and exhibits no jamming or open circuit faults after 10,000 presses. The switch does not loosen or fall off under bumpy road conditions.

Claims

1. A vehicle-mounted emergency power-off device, characterized in that, include: The mounting carrier is located in the vehicle interior area within easy reach of the driver, and has a switch mounting position on it. A normally closed, self-locking power cut-off switch is mounted in the switch mounting position. Normally, it connects the vehicle's low-voltage power control circuit; a single press locks it out, and a second press resets it to connect. An output control wiring group is hardwired in series to the vehicle's low-voltage power control circuit. This output control wiring group directly cuts off the low-voltage control signal without going through the vehicle ECU. A dual-color LED light body is integrated into the switch pressing area, with independent red and white light-emitting units inside. The red light-emitting unit is connected in parallel with the switch contacts as a power-off alarm light source, and the white light-emitting unit is linked with the vehicle's side marker lights as a nighttime background light source. Specifically, in the case of new energy vehicles, the output control wiring group is connected to the low-voltage control circuit of the high-voltage contactor. By disconnecting the low-voltage signal, the high-voltage contactor is de-energized, indirectly cutting off the high-voltage output of the power battery. In the case of gasoline vehicles, the output control wiring group is connected to the low-voltage circuit of the fuel pump / ignition coil to cut off engine power.

2. The vehicle-mounted emergency power-off device according to claim 1, characterized in that, The installation carrier is divided into two categories: prefabricated perforated decorative panels and non-perforated original vehicle interior panels. The non-perforated interior panels can be perforated to process switch mounting positions. The matching threaded locking device locks the switch from the back of the mounting carrier, and is compatible with interior trim panels with a thickness of 1mm-15mm.

3. The vehicle-mounted emergency power-off device according to claim 1, characterized in that, The red light-emitting unit is turned off when the power control circuit is on, and remains on when the circuit is disconnected and self-locked; the white light-emitting unit only illuminates when the vehicle's side marker lights are on, and the two light-emitting units are controlled independently without interfering with each other.

4. The vehicle-mounted emergency power-off device according to claim 1, characterized in that, The gap between the switch and the mounting carrier is sealed with a waterproof component, and the overall protection level reaches IP65; the end of the output control wiring harness is equipped with a quick-connect connector that does not require cutting the wire, so that it can be connected without damage to the original vehicle wiring harness.

5. A vehicle-mounted emergency power-off device according to claim 1, characterized in that, The normally closed self-locking power cut-off switch has a cut-off circuit response time of ≤0.3s, can work stably in an environment of -40℃ to 85℃, and can withstand 10,000 consecutive presses without failure.

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