It is dangerous if charge electric car for too long.

It is dangerous if charge electric car for too long.

A few days ago, we saw a section on Internet titled "How terrible the battery is charged all night!" The video of monitoring video recording battery fire process, from video: electric car battery suddenly sparks, followed by fire to next point of ignition point ignited, 23 seconds after monitoring suddenly interrupted, the entire warehouse began to burn, and speed is very fast.

It understood that this short 23 seconds of fire, the smoke-filled video is real, the fire occurred in an express delivery point in Hangzhou. As a rider of an electric car, the reporter has doubts: Is it easy to catch a fire for an electric car? This reporter did an in-depth investigation and found that there are many people, who equally confused with reporters! The professional said very clearly.to charge the battery of the electric car, try not to exceed 4 hours, so as not to cause damage to the battery, or even explode, causing fire and other accidents.

90% of respondents charge overnight

Because it is necessary to go out often, electric vehicles have become the most convenient means of transportation for journalists. Several friends around them are also "tram party". The electric car of the reporter is a small folding electric bicycle. It has used for nearly eight years. During the period, the battery changed once. The charging location is at home. Before going to sleep at night, until the next morning, I get up about 8-9. Hour.

I have heard people say that when the electric car is charging, the "red light" changes to "green light", indicating that the charging is full, it is necessary to power off in time, but it is difficult to wake up in the middle of the night to power off. Seeing this video, in addition to fear, more is awkward; do not understand how the electric car battery overcharge can bring such serious consequences.

Subsequently, the reporter interviewed ten people who were riding a tram. Nine respondents, like reporters, were charging all night. For the problem that the charging time is too long, it will cause fire. Not almost everyone learned about it in detail. Even if someone knows that charging is not good all night, it is not clear what the specific harm is. Ms. Li said, "My family lives on the sixth floor. The following class will charge the electric car in the small room until the next morning, and the charging time is more than 10 hours."

"When I was riding an electric car five or six years ago, I heard that I couldn't charge it for a long time. At first, I got up in the middle of the night to pull out the charger. After a long time, I would relax my vigilance. I have not had any trouble in these years. It's a bit scary to this video!" Ma Dajie said that her electric car is a lithium battery and sheighs very lightly, so she will charge the battery home every day. Now I think if I really encounter a fire caused by charging overtime. The consequences are unimaginable.

Overcharged explosion

Most of the non-motorized roads on the street are electric vehicles. Open the browser on the computer and enter the keyword "electric car fire". The news related to it is up to hundreds of pages. "The electric car charges a fire and triggers a fire. 38 sleeping tenants escape from the sea". "How many batteries are charged overnight?" terrible! The whole process of monitoring video recording battery fires is the title of the news, and the pieces are shocking.

In a demo video of an electric vehicle battery overcharge, the reporter saw that the electric vehicle battery to be tested put on a plastic bag. After the battery charged for 4 hours, the experiment officially began. A demonstrator said while operating, "We put an ignition device in the plastic bag, and soon everyone will see the danger of overcharge."

At this time, the demonstrator turned on the switch of the ignition device, and only heard a "click", the plastic bag wrapped around the battery exploded, and the fire splashed. The battery blown up? Then, the demonstrator revealed to the audience: "In general, the electric vehicle batteries we use now are all lead-acid batteries. In the overcharged state, hydrogen produced, and hydrogen is a flammable and explosive gas. So, when the plastic bag is filled with hydrogen, it will explode when it ignites."

Recommendation: Do not charge more than 4 hours

So, how long does it take the electric car battery to charge? The reporter got in touch with Master Liu, who has been engaged in the electric vehicle industry for 20 years in Yucai Street. Master Liu introduced that there are two main types of electric vehicle batteries: lithium batteries and lead-acid batteries, and lead-acid batteries are the most common.

Mr. Liu said that under normal circumstances, if it were a brand-new battery, and use matching charger, then the charger would have an overcharge protection device, when the battery is full, it will not charge the battery. At this time, the battery will not overcharge even if the power plug not removed. However, if the charger is not used, or if the charger is faulty, or the battery is aging, the overcharge protection device may fail. Mr. Liu suggested that the battery of the electric vehicle should charged. Try not to exceed 4 hours to avoid damage to the battery and even cause fire and other accidents.

The page contains the contents of the machine translation.