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What are the causes of electric vehicle fires?

Release time:

2023-03-03 17:37

All kinds of electric field vehicles are becoming more and more popular, such as electric patrol cars, electric sightseeing vehicles, electric fire trucks, electric sanitation vehicles, etc., such vehicles gradually serve a wide range of major municipal units, scenic spots, community streets, school factories, etc., but with the large use of such electric vehicles, there have been some incidents of body fire, which need to attract certain attention from the public, so what are the causes of electric vehicle fires, how should we avoid such incidents, this article will analyze in detail and introduce, hope It can help you in some way.

1. Line short circuit

Some electric vehicle lines are not protected or not protected in place, resulting in broken insulation and short circuits. There are also some cars with a long battery life, the internal circuit is easy to short circuit caused by spontaneous combustion, or the battery installation is not standardized, in long-term use, friction will also lead to short circuit, thus causing battery fire.

However, the possibility of this situation is still quite low, but it cannot be said that there is no possibility, and the way to prevent short circuits in wires when charging is to use qualified wires. In addition, old electric vehicle users should always check the inside of the battery, especially whether the wires on the battery are corroded and whether the joints are loose, which are key inspection items.

2. Unbalanced between battery packs

A group of batteries cannot be identical, and after multiple charges and discharges, poor quality batteries will reduce the voltage and appear unbalanced. After repeated many times, the gap widens, resulting in overcharged batteries have been overcharged, and uncharged batteries have been overdischarged, which not only causes the service life of the battery pack to be greatly reduced, but also causes the entire group of batteries to be overcharged.

Prevention method: find a professional battery maintenance personnel, balance the battery pack with a special balancing machine, adjust the capacity of each battery in the battery pack to be consistent, and make the battery pack evenly charged and discharged.

3. Charger quality problems

In the case of qualified batteries, if the charger is unqualified, using a charger that does not match the original battery is easy to cause electrical failure. In addition, overcharging can also lead to fires, such as charging times of more than 12 hours or more. If the vehicle cannot be powered off in time after full charge, or the current is too large, it is easy to overcharge and cause fire. So be sure to use a qualified charger!

4. Battery material problems

Especially lithium batteries, now everyone wants lithium batteries with large capacity, most of the lithium batteries used on electric vehicles, and this lithium battery is a battery with a high risk of fire.

In addition, the shell of lead-acid batteries is mostly made of ordinary plastic, which is cheap but not resistant to high temperature and fire, and is also a fire factor. Therefore, in order to prevent the battery from causing fire, it is also necessary to do a good job in the construction of related supporting facilities.

5. Miscellaneous low-quality and low-cost electric vehicles

Fire due to quality issues. Electric sightseeing car market competition is fierce, some illegal electric vehicle manufacturers, in order to earn illegal profits, reduce costs, electric vehicle accessories cut corners, are using inferior low-cost products, especially inferior chargers do not turn the lights, and inferior wires are easy to age, is the most important cause of electric vehicle fire.

6. Improper use by humans

Improper human use can also cause electric vehicles to catch fire. Electric vehicle charging time is generally 6 to 8 hours is appropriate, especially in summer, hot weather, to be strictly controlled within 8 hours, but some consumers for convenience, or forget the charging time, resulting in too long charging time.