The Qianjiang Evening News reported that on April 11, a fire broke out in a private house in Hualian Village, Sandun, Xihu District, Hangzhou City, causing 3 people to ***. At present, it is preliminarily determined that the fire was in the electric vehicle storage place; April 22, Wenyan, Xiaoshan District A fire broke out in a farm house in Lingjiawu Natural Village, Shanhe Village, Sub-district, and 5 people were unfortunately killed. The cause is still ***. The two fire accidents that occurred in the village in the city have aroused the great concern of the Hangzhou Municipal Party Committee.
Urgent notice: Electric vehicles are not allowed to be charged overnight. How much do you know about safety?
It is reported that Hangzhou *** recently issued the "Emergency Notice on Further Strengthening the Work of Safety Production Management such as Fire Safety in Urban Villages." The notice puts forward 5 specific requirements, in particular, it is necessary to strictly implement safety measures for parking and charging electric bicycles. Residential rental houses must establish centralized parking spots for electric bicycles that meet the requirements of fire safety technical precautions or set up intelligent charging piles for electric bicycles. The grass-roots patrol force should increase the inspection and inspection of electric bicycles, and implement the "two rules" (electric bicycles will not be parked in corridors and other areas, and they will not be charged overnight) and "two mandatory" (adopting measures for illegal parking and charging problems found) Forced removal, forced power off) requirements.
Hangzhou will also carry out a large-scale investigation and remediation of hidden safety hazards in urban villages within the city.
How much do you know about electric vehicle charging?
Electric vehicles have become the main travel tool for citizens. While bringing benefits to everyone, they also bring traffic safety hazards that cannot be ignored. At the same time, electric vehicle fires that have occurred in recent years have gradually attracted the attention of the fire department. Electric vehicle fires are mostly when charging. According to firefighting professionals, once an electric vehicle catches fire, the temperature will reach 200°C 90 seconds after it catches fire, and the fire will develop rapidly in an instant. For this reason, the editor specially reminds the general public that electric vehicle charging should pay attention to safety precautions is the key point.
1Electric vehicles are easy to catch fire when charging
Electric bicycles are easy to catch fire when charging. The root cause is related to the charging environment of the electric bicycle, the habit of the owner and the material of the electric bicycle. The main reasons are the short circuit of the electric vehicle itself, the overload of the charger circuit, and the fault of the electric vehicle battery. .
The electric vehicles produced by some manufacturers also have some defects, such as the mismatch between the design current and the circuit and the connector, the improper handling of the plugin and the connector, and the irregular wiring. Statistics found that many electric vehicle fire accidents in our city occurred during the charging process, and the charging time was more than 4 hours.
Because electric vehicles are relatively heavy, inconvenient to move up and down, and not suitable for storage in the open air, most households usually move their electric vehicles indoors at night and charge them. The storage locations are mostly in the first-floor hall, aisle or In the stairwell, conditions are concentrated in the garage and carport.
When electric vehicles are charged indoors on the first floor of a building, in the event of a fire, flames and dense smoke will block the safety exits and escape routes of the building, which is very easy to cause casualties and even casualties.
2 The instantaneous high temperature of electric vehicle fire is 200℃
An experiment by the fire department found that once an electric vehicle caught fire, the temperature reached 200°C 90 seconds after the fire, and the fire developed rapidly in a flash.
The corridor as an escape route will be blocked by open flames and dense smoke, making it more difficult for residents to escape safely, and the burning of an electric vehicle can cause hundreds of people to suffocate and die! When the materials of electric vehicles are burned, they will produce highly toxic gases such as ***, which fills the building. Secondly, after high temperature smoke enters the air duct, it will cause severe burns and suffocation.
The burning of electric vehicles produces a lot of black smoke, which easily leads to insufficient light in the building and brings great difficulties to the evacuation of people. Electric bicycles are parked in the corridor, this phenomenon is not uncommon. Experiments have shown that in the event of a fire, the escape time for residents is shorter than you think.
Electric vehicle charging prevention advice
1. Pull the plug before going to bed. Charging overnight is one of the reasons, so disconnect the power as much as possible before going to bed.
2. The charger cooling fan is damaged. When the charger is working, it needs to convert a high voltage to a low voltage. Therefore, if the charging time is long, the transformer coil will heat up, and if the ventilation and heat dissipation are not good, the high temperature will cause fire.
3. The pros and cons of the charger. Inferior chargers or chargers that do not meet specifications are more likely to catch fire, especially Japanese electric vehicles. The standard *** electric voltage is 110V, and the domestic standard voltage is 220V. If you charge directly, it is easy to catch fire. .
4. The battery is sealed too badly. Lead-zinc batteries will produce oxygen and hydrogen during charging. If the ventilation is poor and high temperature sources are encountered, not only will it catch fire, but it will also cause problems. The storage battery is too tightly sealed, and the gas generated by charging cannot escape, and it will burst and catch fire when it reaches a certain pressure.
5. The charger plug is wet. If the charger plug is wet, it is easy to cause a short circuit. When it is rainy or wet, check the charging port before charging.