Vehicle Thermal Runaway Solutions
For a long time, it seems that it is difficult for new energy vehicles to get rid of the problem of "spontaneous combustion". Because of the existence of batteries and high-voltage systems, its safety is concerned by many consumers. In particular, the battery, as a flammable and explosive substance, makes many car owners worried.
Fires can occur for a variety of reasons. Some burn after a collision, some burn while charging, and some spontaneously ignite without warning when driving or standing still. Blind pursuit of long battery life also brings battery safety hazards to pure electric vehicles. In order to achieve long battery life, it is necessary to increase the specific energy of the battery (that is, unit mass/energy per unit volume).The commonly used method is to adjust the battery structure, continuously reduce the auxiliary parts such as the shell and interlayer, and only retain the cathode, anode and electrolyte related to the battery performance.These subtracted parts are actually very important to ensure the safety of the battery. After removal, it is easy to cause thermal out of control. After the battery density is too high, its instability also buried the hidden danger of spontaneous combustion.It should be noted that when the fire is big, the power battery will be bent, deformed, and damaged. In addition to leakage, there may also be a large amount of toxic gas leakage at the scene.
In 2017, the country's new regulations stipulate that there must has a battery combustion alarm device inside the battery box of large passenger cars. At this stage, the alarm methods on the market are wired temperature sensing cables, fire detection tubes, smoke detection etc. Which is the most effective detection method?
|Product type||Monitoring method||Feature comparison||Performance comparison|
|Linear temperature sensing cable self-starting fire extinguishing device||Passive||Threshold judgment (temperature detection)||Severe lagging (action will only take place after fire)|
|Fire detection tube temperature-sensing self-starting fire extinguishing device||Passive||Threshold judgment (temperature detection)||The monitoring coverage is small, seriously lagging (the action will only take place after the fire)|
|Vehicle smoke alarm system||Active||Each independent threshold judgment (smoke detection, temperature detection, gas detection, flame detection)||The alarm is in the front, the anti-interference is poor, the false alarm rate is high,|
Solution for protecting the lives of drivers and passengers
Winsen Technology's battery combustion detection module responds quickly and alarms to the battery before and during combustion, which can effectively protect the life safety of drivers and passengers
The ZEP01 battery detection module is a general and miniaturized module, which uses the principles of electrochemical and planar semiconductors to detect the volatile gas of the battery and the gas generated when the battery is burned. Conduct triple detection on the battery box before and during combustion through gas, smoke, and temperature sensing cables. ZEP01 is a battery combustion comprehensive gas detection module designed and manufactured by closely combining mature electrochemical detection technology with semiconductor detection technology.
- Gas detection: the gas(CO, nitrides, lithium compounds, etc.)volatilized before the combustion of the battery is detected, which has a good early warning effect.
- Smoke detection: in the early stage of battery combustion, there will be smoke generated, smoke sensor senses smoke then alarm, which has a good alarm function and can be used as a mid-term early warning signal.
- Temperature sensing cable detection: The temperature sensing cable is used as an action signal to link the fire extinguishing device. When a fire occurs, the temperature sensing cable is fused and a short circuit occurs, and an action signal is sent to start the fire extinguishing device (dry powder, aerosol, etc.) to extinguish the fire.
▲ ZE21-CS battery leak
ZE21-CS electrochemical battery leakage detection module is a special, miniaturized module. The electrochemical principle is used to detect the volatile gas of the battery liquid and the integrated gas generated when the battery is burned, which has good gas selectivity and stability. Built-in temperature sensor for temperature compensation, with serial data output, high acquisition accuracy.
ZE12A is a general-purpose and high-performance electrochemical module. It can detect the CO, SO2, NO2, O3 based on electrochemical principle, it has good selectivity and stability. A temperature sensor is built-in for temperature compensation. It has the digital output and analog voltage output at the same time which facilities the usage and calibration and shorten the development period. It is a combination of mature electrochemical detection principle and sophisticated circuit design, to meet customers’ different detection needs.
ZP01-MP503 air-quality module adopts flat surface semiconductor gas sensor. The module has very high sensitivity to volatile organic gases such as formaldehyde, benzene, carbon monoxide, ammonia, hydrogen, alcohol and smoke of cigarette, essence &etc. The module has been aging, debugged, adjusted and calibrated. So it has good consistency and high sensitivity.
ZP16 air-quality module adopts flat surface semiconductor gas sensor. The module has good sensitivity to volatile organic gases such as formaldehyde, benzene, carbon monoxide, ammonia, hydrogen, alcohol and smoke of cigarette, essence &etc. The module has been aging, debugged, adjusted and calibrated. So it has good consistency and high sensitivity.
The MH-Z19D carbon dioxide gas sensor uses the principle of non-dispersive infrared (NDIR) to detect the presence of CO2 in the air, and has two types of pins and terminals. It is a high-performance sensor produced by combining mature infrared absorption gas detection technology with precise optical path design and sophisticated circuit design.
MH-Z19C NDIR infrared gas module is a common type, small size sensor, pins type or terminal type, using non-dispersive infrared (NDIR) principle to detect the existence of CO2 in the air, with good selectivity, non-oxygen dependent and long life. Built-in temperature compensation; and it has UART output and PWM output. It is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design and superior circuit design.
MH-Z19E NDIR infrared gas module is a common type, small size sensor, pins type or terminal type, using non-dispersive infrared (NDIR) principle to detect the existence of CO2 in the air, with good selectivity, non-oxygen dependent and long life. Built-in temperature compensation; and it has UART output and PWM output. It is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design and superior circuit design.
ZE08K-CH2O electrochemical chemical formaldehyde module is a universal, small Module. The use of electrochemical principles to detect CH2O in the air, which has good selectivity and stability. At the same time, it has digital output and analog voltage output for easy use. ZE08K-CH2O is a universal gas module designed to design mature electrochemical detection technology with excellent circuit design.
ZS05 temperature and humidity module is a digital signal output temperature and humidity sensor module. It uses dedicated digital module acquisition technology to ensure high reliability and stability. ZS05 adopts standard IIC communication mode, which can be directly connected to IIC communication bus, easy to use
MEMS combustible gas sensor is using MEMS micro-fabrication hot plate on a Si substrate base, gas-sensitive materials used in the clean air with low conductivity metal oxide semiconductor material. When the sensor exposed to gas atmosphere, the conductivity is changing as the detected gas concentration in the air. The higher the concentration of the gas, the higher the conductivity. Use simple circuit can convert the change of conductivity of the gas concentration corresponding to the output signal.
MEMS combustible gas sensor is using MEMS micro-fabrication hot plate on a Si substrate base, gas-sensitive materials used in the clean air with low conductivity metal oxide semiconductor material. When the sensor exposed to gas atmosphere, the conductivity is changing as the detected gas concentration in the air. The higher the concentration of the gas, the higher the conductivity. The sensor has high sensitivity and small size, and adopts I2C digital signal output mode to facilitate the observation of multiple sensor networks. It also pre-sets a pin for alarm trigger signal output, which can be widely used in many fields such as environmental safety and portable instruments.
How to choose the right sensor for your project?
We have 17 sensor series, 200+ categories, and 300+ detection objects for gas detection. Such as CO, CO2, VOC, PM2.5, CH4, LPG and so on. In particular, we also have MEMS sensors. According to your industry application, gas principle, power consumption, accuracy, and range requirements, and we can select a specific model for you. You can also use the product filter below to choose a suitable product, or choose online serivce.
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