Safety Focus丨Spontaneous combustion of electric vehicles occurs frequently, how to deal with potential safety hazards?

On July 18, near the Yuhuang Villa in Hangzhou, an electric bicycle suddenly caught fire while driving, and it instantly burned into a fireball. The father and daughter on the electric bicycle were severely burned. It is understood that the burn area of ​​the little girl's whole body has reached more than 95%, and she has been notified of critical illness three times and may need intubation for life.

According to statistics from the Fire and Rescue Bureau, since the beginning of this year, there have been 6,462 electric vehicle fire accidents across the country, and the bloody incidents and figures have once again sounded the alarm for us.

Lithium batteries become "stealth bombs"

On July 21, the Hangzhou Fire Detachment determined that the cause of the electric vehicle fire was the failure of the lithium battery that was replaced later.

Lithium batteries will heat up, burn and explode when exposed to water, bumped, or overcharged and discharged. In addition, lithium dendrites are easy to form on the negative electrode when the lithium battery is discharged at a large current, which pierces the separator, resulting in a short circuit inside the battery and then explosion. Therefore, lithium batteries will be equipped with electronic protection boards, but some small manufacturers reduce the amount of protection boards to control costs, which brings hidden dangers.

The market will face rectification

It only takes three and a half minutes for an electric vehicle to catch fire to complete combustion. The temperature is as high as 1200 degrees. If it occurs, it will inevitably cause serious casualties. Therefore, it is very important to regularly check the quality and status of the battery.

After the "718 Incident", Hangzhou will face the first wave of rectification. Relevant departments have begun to conduct random inspections on the products of electric vehicle manufacturers and the lithium batteries used. At the same time, 2,400 terminal stores and repair shops in the industry will face this incident. comprehensive remediation. It is believed that in the second half of the year, the electric vehicle industry across the country will face rectification.

Electric vehicle battery precautions

safety rules

1. Do not use non-original chargers

The voltage and current of the non-original charger may not match your electric vehicle. When encountering inferior products, it will cause great damage to the battery and cause danger!

2. Do not replace brand-name lithium batteries

The price of a qualified 48-volt lithium battery will generally be more than 700 yuan, and the lithium battery with too low price may lack the necessary safety guarantee. It is best to use the original brand store.

3. Do not overcharge

Although many chargers have overcharge protection, if they are in an overcharged state for a long time, the chargers and batteries will be in a "tired" state, and their lifespan will be affected.

4. Always check the battery status

Often the battery is bulging to see if the battery needs to be replaced.

5. Do not expose electric vehicles to the sun

Do not charge immediately after exposure to the sun, it is easy to cause bursting and burning, remember to touch the battery before charging, wait until it cools before charging, and usually place the charger in a place where heat dissipation is ventilated.

6. Don’t use one power strip to charge multiple electric vehicles

It is easy to cause voltage instability, increasing the probability of leakage, explosion and fire.

7. The battery needs to be removed if not used for a long time

Separate the battery from the body to prevent a fire from short-circuiting the battery circuit when not in use.

How to deal with spontaneous combustion of electric vehicles

In daily life, it is necessary to check the circuit plug points frequently to prevent the contact points from sparking and heating due to poor contact; to avoid the occurrence of short circuits and series power accidents caused by aging and wear of the lines.

If you encounter an electric vehicle spontaneously igniting, it is also important to carry out the correct rescue when conditions permit:

①Turn off the switch at the first time to prevent electric shock and leakage accidents

②Use ABC dry powder fire extinguisher or carbon dioxide fire extinguisher to extinguish the fire. If there is no fire extinguisher nearby, you can also use dry sand to sprinkle on the fire point to extinguish the fire

③ If the fire is urgent and difficult to control, you should quickly call 119 for rescue. Of course, the more important thing is to prevent it from "burning".

Lithium battery maintenance test solution

Our lives are closely related to lithium batteries, which are now widely used in various industries: consumer electronics, electric vehicles, industrial energy storage devices, etc. In order to deal with the frequent explosion of lithium batteries, it is particularly important to use relevant professional equipment for detection.

E-Nanny Electric factory has developed a complete set of intelligent test instruments and maintenance solutions for lithium battery research, and related test and maintenance products have been widely used in domestic lithium battery manufacturers and new energy vehicle companies.

Some partners

E-Nanny Electric factory has passed the complete lithium battery test links such as lithium battery charge and discharge test, battery pack balanced maintenance, battery cell inspection, etc., as well as a sound pre-sale and after-sale lithium battery quality assurance system, to ensure the safety and security of lithium batteries. Core requirements such as battery life and longevity provide a good service experience for users at all stages of lithium battery application!