Recently, there have been frequent incidents of electric vehicle explosions and fires. What do you think about this? ?

okhxyyo

Recently, there have been frequent incidents of electric vehicle explosions and fires. What do you think about this? ? [Copy link]

 

I just bought a Niu electric scooter two months ago and became a "car owner". After I was forced to learn how to drive an electric scooter, I was a road killer. I don't want to drive it, so I'm really good at it. I don't have to walk every day, which saves time. Occasionally, I can take my daughter to the park half an hour away to play.

Nowadays, many families have an electric car, and some families even have two or more. With the popularity of electric cars, the parking management and safety of electric cars are the next key considerations. With the arrival of summer, the weather is getting hotter and hotter, and electric car explosions and combustion incidents are frequent, which not only causes financial losses, but also poses a threat to personal safety. In just two months, Guan Guan has heard of seven or eight electric car explosions and combustion incidents. The most recent one was an electric car explosion in a community in Fuzhou, which is very close to Guan Guan's residence. It is said that hundreds of cars were burned in a row.

So, what is the reason why electric vehicles explode so frequently? How much harm will the explosion and combustion of an electric vehicle cause? And how can we alleviate and improve this problem? ? ? ?

Welcome everyone to come and chat~~

chunyang

The NIU electric vehicle is made by Li Yinan, and has a good reputation among electric vehicles, so you can trust the management.

The explosion and fire of electric vehicles caused by non-collision are mainly caused by two aspects: circuit and battery. In terms of circuit, the design or quality of the charging and battery protection circuits are problematic, which can only be avoided by choosing the right brand. In terms of batteries, the explosions and fires are all lithium batteries, and this can only be guaranteed by brand selection. Most electric motorcycles/bicycles are powered by lead-acid batteries, which do not have the problem of explosion and fire, even if they are knockoffs. The lithium element in lithium batteries has an active chemical property, so lithium batteries have safety issues. Unreasonable charging, load short circuit, high temperature, strong mechanical shock, etc. may cause problems, and unqualified quality itself also has hidden dangers.

Lithium battery-powered electric vehicles must be charged with the original power adapter and try to avoid direct sunlight, especially avoid charging when the battery is at high temperature. If exposure to the sun cannot be avoided, do not fully charge the battery if the mileage is sufficient. A half-charged lithium battery is safer than a fully charged one at high temperatures.

okhxyyo

chunyang posted on 2021-7-6 15:49 Niu electric vehicles are made by Li Yinan, and have a good reputation among electric vehicles. You can rest assured that the management can be assured. The explosion and fire of electric vehicles caused by non-impact are mainly caused by circuits, ...

So that's it. In other words, in the case of existing electric vehicles, avoiding overcharging and avoiding high temperatures are more important protective measures.

chunyang

okhxyyo posted on 2021-7-6 16:11 So that's it. In other words, in the case of existing electric vehicles, avoiding overcharging and avoiding high temperatures are more important protective measures.

Avoiding high temperature is the first priority. If you can't avoid it, just don't charge it fully. This is only valid for lithium batteries, not lead-acid batteries.

chunyang

Here we need to pay attention to the definition of "high temperature". Even if the temperature is extreme, it is generally only about 30 degrees Celsius, which is not considered high temperature for lithium batteries, but it is different if it is exposed to the sun, and it is very likely to exceed 70 degrees. The maximum operating/storage temperature of conventional lithium batteries is 60 degrees Celsius, and the power battery will be higher, but it should not exceed 70 degrees Celsius.

okhxyyo

chunyang posted on 2021-7-6 16:26 Here we need to pay attention to the definition of "high temperature". Even if the temperature is extreme, it is generally only about 30 degrees Celsius, which is not considered high temperature for lithium batteries, but...

Is it possible that future batteries can withstand even higher temperatures? Can they be improved to a higher degree?

chunyang

okhxyyo posted on 2021-7-6 16:35 Is it possible that future batteries can withstand even higher temperatures? And be improved to a relatively high degree?

The problem is the cost. How much are you willing to pay for it? Special lithium batteries that can withstand high temperatures are available, but they are very expensive and their energy-to-weight ratio will decrease.

okhxyyo

chunyang posted on 2021-7-6 16:47 The problem is the cost. How much money are you willing to pay for it? There are special high-temperature resistant lithium batteries, which are very expensive and the energy-to-weight ratio will decrease.

That's true, I can only say that we have to wait until the technology improves and the price comes down.

kangkls

It seems that buses are powered by lithium batteries, so not many are burned. I guess it’s because the battery costs are high.

chunyang

kangkls posted on 2021-7-6 18:59 It seems that buses are powered by lithium batteries, so not many are burned. I guess it’s because the battery cost is high.

They are all ordinary power batteries, which are more expensive than ordinary consumer-grade batteries, but their safety is mainly guaranteed by manufacturing quality control and standardized use.

chunyang

okhxyyo posted on 2021-7-6 17:50 That's true. I can only say that we have to wait until the technology improves and the price comes down. .

Niu uses 18650 power batteries, which should be safe in themselves. There have been no reports of explosions or fires so far.

annysky2012

Niu electric vehicles are made by Li Yinan, and have a good reputation in electric vehicles. You can trust them. Electric vehicle explosions and fires caused by non-collision are mainly caused by circuits and batteries. The circuit aspect is mainly due to problems with the design or quality of the charging and battery protection circuits. This can only be avoided by choosing the right brand. In terms of batteries, explosions and fires are all lithium batteries, and this can only be guaranteed by brand selection. Most electric motorcycles/bicycles are powered by lead-acid batteries, which do not have the problem of explosion and fire, even if they are knockoffs. The lithium element in lithium batteries has active chemical properties, so lithium batteries have safety issues. Unreasonable charging, load short circuit, high temperature, strong mechanical impact, etc. may cause problems. Unqualified quality itself also has hidden dangers. Electric vehicles powered by lithium batteries must be charged with the original power adapter and try to avoid direct sunlight, especially avoid charging when the battery is at high temperature. Exposure to the sun cannot be avoided. If the cruising range can be met, do not fully charge the battery. Half-charged lithium batteries are safer than fully charged batteries at high temperatures.

Give a thumbs up!!!

zhangjt0713

Electronic engineers all know that you get what you pay for. You can buy a charger for 30 yuan or 100 yuan! The quality is different.

kangkls

zhangjt0713 posted on 2021-7-7 08:58 Electronic engineers all know that you get what you pay for. You can buy a charger for 30 yuan and you can also buy one for 100 yuan! The quality is different

What's the difference?

qwqwqw2088

Most batteries are damaged due to overcharging, overcharging, unauthorized wiring, and charging cables and chargers.

The battery usually fails by deforming the battery slot first, then increasing the internal pressure, and then cracking the shell.

xutong

Lead-acid batteries are relatively safe, but have low energy density.

Lithium batteries also include ternary lithium batteries and lithium iron phosphate batteries.

Compared with ternary lithium battery, lithium iron phosphate has better stability, but the power density of lithium iron phosphate is not as high as that of ternary lithium battery.

Electric vehicles with medium to long battery life generally use ternary lithium batteries, while those with shorter battery life generally use lithium iron phosphate batteries.

Compared with ternary lithium batteries, lithium iron phosphate has a greater cost advantage and a longer cycle life.

Lithium batteries have their own oxidants inside, so when a lithium battery burns, it is basically impossible to put it out with a fire extinguisher, which is still very dangerous.

yej瓦达瓦

zhangjt0713 posted on 2021-7-7 08:58 Electronic engineers all know that you get what you pay for. You can buy a charger for 30 yuan and you can also buy one for 100 yuan! The quality is different

really

laocuo1142

Many of them are caused by the age of the car, and the battery is unsafe, which leads to explosion. New cars are not so bad.