Intelligent dual-mode fireproof suit headrest system for new energy automobile and emergency control method

Abstract

The invention discloses an intelligent dual-mode fireproof suit headrest system for a new energy automobile and an emergency control method. The problems that a traditional device is low in space utilization rate (smaller than 50%), slow in response (larger than 1.2 seconds) and high-temperature adhesion (the breakage rate is larger than 30%) are solved. The system adopts a main / auxiliary dual-mode storage cavity, a main cavity (110) realizes a compression ratio of 8: 1 based on spiral compression folding, and an auxiliary cavity (210) realizes a space utilization rate of 84.7% based on spiral compression folding. A temperature control triggering device (120) and a Bluetooth signal receiver (340) are integrated, a vehicle collision / battery thermal runaway signal is received in real time through a BLE 5.0 module, and two-stage pressure relief (311) ejection and unfolding of a memory alloy framework (212) are completed within 0.5 second after triggering. The fireproof suit is made of aramid fiber / PBO blended fabric (the oxygen index is larger than or equal to 35), the perfectness rate is larger than 99.8% through 150 DEG C / 30 min tests, and no performance degradation exists after 50 times of high and low temperature circulation. The system adapts to the space of the seats in the front row and the rear row, fireproof protection is achieved, and the requirement of GB / T 31498-2023 is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle passive safety, and in particular relates to an intelligent dual-mode fireproof clothing headrest system and an emergency control method for new energy vehicles. Background Art

[0002] Defects of the existing technology (reference document CN110626240A corresponding to the 2019 publication): The storage volume of traditional vehicle-mounted fire protection devices is greater than 8L, and the space utilization rate is less than 50%. Emergency use requires multiple steps, and the average time is greater than 8 seconds. Fire protection clothing is prone to adhesion in high temperature environments, and the damage rate is greater than 30%. The comparison between this system and CN110626240A is as follows: Comparison Items Prior art The present invention Storage volume 8L (space utilization rate 45%) Main chamber 3.5L / sub-chamber 5.2L (space utilization rate 84.7%) High temperature adhesion rate 32% (150℃ / 30min) 0.2% (150℃ / 30min) System response time 1.2s 0.5s Summary of the invention

[0003] Dual-mode storage architecture: The main mode is spiral compression of the headrest cavity (compression ratio 8:1). The secondary mode is spiral compression of the hood cavity (volume 3.5L)

[0004] Intelligent trigger system: The system continuously communicates with the central control system of the automobile through a Bluetooth signal receiver (340) to learn whether the automobile is in an emergency state. If it is learned that the battery of the automobile is overheated, on fire, or impacted, the system transmits a signal to the communication and control chip (350). The chip issues a command to start the temperature sensor (320) to detect the temperature inside the vehicle. When the temperature inside the vehicle is detected to be higher than 80° C., the temperature sensing opening device (120) is started, the two-stage pressure relief valve (311) is started, and the fireproof suit ejection mechanism (330) is triggered through the explosion relief channel (312), and the memory alloy skeleton is triggered to unfold at the same time, so that the fireproof suit stored in the main cavity or the auxiliary cavity is ejected.

[0005] Application scenario switching: Based on the narrow space in the front row of the car, the priority is to use mode A: the main storage cavity headrest storage, and the rear seat space of the car is wider, so the priority is to use mode B: the hooded secondary storage cavity storage. It can also be optimized according to the seat space of different models. Technical Effects

[0006] After testing by China Automotive Research Institute, the function remained unchanged after 50 high and low temperature cycles. Experimental data: ‌1. Fire retardant clothing compression performance test (according to GB / T 3923.1-2013)‌ Compression ratio Expand time (s) Fabric damage rate 8:1 1.5±0.2 0% 10:1 2.1±0.3 3.2% 2. High temperature environment test (according to GB / T 31498-2023) Temperature (℃) Exposure time (min) Fire protection clothing integrity Ejection success rate 150 30 99.8% 100% 200 5 95.4% 97.3% ‌3. System response reliability test‌ Test cycle number Temperature gradient trigger error (℃ / s) Pressure relief valve start delay (ms) 50 ±0.8 ≤300 100 ±1.2 ≤350

[0007] The integrity rate of fire-resistant clothing in an environment of 150℃ is >99.8%.

[0008] The linkage error with the vehicle system is less than 0.1 second. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 : System structure decomposition diagram. Main storage chamber (110), hooded auxiliary storage chamber (210), fireproof suit (200), memory alloy frame (212), Bluetooth signal receiver (340), communication and control chip (350), temperature sensor (320), temperature sensing opening device (120), double-stage pressure relief valve (311), explosion relief channel (312), fireproof suit ejection mechanism (330).

[0010] Figure 2 : Mode A of the dual-mode storage mode: headrest storage in the main storage cavity, 110(a) is the front view, 110(b) is the back view, and 110(c) is the side view.

[0011] Figure 3 : Mode B of the dual-mode storage mode: storage in the hooded secondary storage chamber, 210(a) is the front view, 210(b) is the back view, and 210(c) is the side view.

[0012] Figure 4 : Control logic flow chart. Bluetooth signal receiver (340), communication chip (350), temperature sensor (320), temperature sensing opening device (120), double-stage pressure relief valve (311), explosion relief channel (312), fireproof clothing ejection mechanism (330), memory alloy frame (212). DETAILED DESCRIPTION

[0013] Embodiment 1 (adapted to the front seats of cars) The main storage cavity size of the headrest body is: 300×280×100mm; Fireproof clothing folding: spiral compression storage material parameters: aramid / PBO blended fabric (weight: 300g, warp and weft density 6.5oz, oxygen index ≥35).

[0014] Example 2 (adapted to the rear seats of the car) ‌Hooded storage cavity size: 400×280×150mm; Fire retardant clothing folding: spiral folding method; Material parameters: Aramid / PBO blended fabric (oxygen index ≥35).

Claims

1. An intelligent dual-mode fireproof clothing headrest system for new energy vehicles, characterized in that include: ‌ A headrest conforming to GB 11550, wherein the body is provided with a main storage cavity (110) and a hooded auxiliary storage cavity (210), the cavity wall is coated with a 0.2-0.5 mm ceramic silicone rubber layer (conforming to QC / T 897-2023 standard, oxygen index ≥35), the fireproof clothing (200) can be stored in the main storage cavity or the auxiliary storage cavity in a folded and compressed form, the compression ratio is ≥8:1 (tested by GB / T 3923.1-2013), the main storage cavity has a built-in Ni-Ti memory alloy skeleton (212), the phase change temperature is 80±5°C (trigger condition: the temperature sensor detection value is ≥80°C and the temperature gradient is >10°C / s), the system is equipped with a Bluetooth signal receiver (340), a communication and control chip (350), a temperature sensor (320), a temperature sensing opening device (120), and a demolition force threshold of 5.0±0.5 kN (according to GB / T 16825.1-2018 test), and is equipped with a double-stage pressure relief valve (311).

2. The system according to claim 1, characterized in that The main storage cavity (110) is arranged at the seam between the hood and the body of the fireproof clothing. When the clothing is worn, the main cavity is in a U-shape and surrounds the neck of the human body. The storage cavity has a size of 300×280×100 mm after storage. A magnetic fixing device is provided. After storage, the storage cavity has a U-shaped structure and is fixed to the headrest bracket of the automobile seat.

3. The system according to claim 1, characterized in that The hooded auxiliary storage cavity (210) utilizes the hooded space of the fireproof clothing for storage. The storage cavity has a size of 400×280×150 mm after storage. It is equipped with a magnetic fixing device and an elastic rope. After storage, it is fixed on the top of the car seat backrest in a half-moon structure.

4. The system according to claim 1, characterized in that The main storage cavity includes an explosion relief channel (312) with a diameter of Φ6 mm and a length-to-diameter ratio of 1:8 (error ±5%). When the temperature sensor (320) detects a temperature gradient of >10°C / s (sampling frequency ≥10Hz) in the workshop space, the fire protection suit ejection mechanism (330) is triggered and linked to the vehicle-mounted BMS system through the CAN bus protocol (ISO 11898-2:2016 standard), and the response delay is ≤0.5s.

5. The system according to claim 1, characterized in that The expansion time of the Ni-Ti memory alloy skeleton (212) is 0.8-1.2s (the standard deviation is less than 0.1s after 10 cycle tests at 80°C).

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