Lifting a 1 yuan coin and throwing it into the rocker is a thing that children of two or three years old are willing to imitate and try. And no one expected that in the eyes of the 3-year-old girl Tongtong (pseudonym), the battery jack on the electric car was so similar to the coin slot of the rocker that she usually likes. When she raised her little hand and threw the coin into the jack, her right hand was burned by the current, and the coin was also burned.

The jack short-circuited the girl and was burned

I saw sparks rising, ran over to see, the doll's right hand is burnt! Recall the scene that happened at that time, Tongtong's grandmother still has lingering fears and can't tell what happened at that time.

Tongtong lived at Dadukou. The day before yesterday afternoon, the weather was nice. Grandma took Tongtong to bask in the sun in the yard. She was happy to watch her granddaughter while doing things.

When 3-year-old Tongtong was curious about everything, the electric car (similar to a rechargeable motorcycle) parked in the corner of the yard caught her attention. The electric car was parked in the yard by a relative and was charging. Tongtong walked over and looked at it. Later, she didn't know where the child found a coin and stuffed it directly into the jack on the electric car battery.

Grandma heard her granddaughter crying and rushed over. The scene in front of her scared her to death. Her granddaughter's right hand was dark and burnt. Later, everyone found a 1 yuan coin in the plug, which had also been burned.

Tongtong was then sent by his mother to the Children's Hospital Affiliated to Heavy Medicine. Professor Tian Xiaofei, director of the Department of Burn and Plastic Surgery, said that this is the second child who has been treated for electric burns in the past week. Fortunately, Tongtong's right hand was only burned, which was a third-degree electric shock injury, and other parts of the body were not seriously injured.

What the hell is going on? Tong Tong was obviously terrified by all this. She told her grandmother, I want to ride in a rocking car!

It turned out that Tongtong often played in a rocking car, and was very familiar with the rules of paying coins when riding a rocking car. When he saw the charging socket on the electric car, he regarded it as the coin slot for the rocking car.

Inserting a coin instantly causes a short circuit

Why do electric vehicle batteries hurt people? There have been media reports before that electric vehicle batteries may hurt people even if they are not charged. Is this true?

Mr. Qin, who is engaged in high-voltage safety work of electric vehicles, introduced that there are indeed two types of standardized and non-standardized electric vehicles on the market. Standardized electric vehicles have anti-tentacle devices. Simply put, human fingers cannot be inserted, let alone coins. When a short circuit suddenly occurs, the battery insulation management system will disconnect the circuit through an instant power failure.

However, some non-standardized electric vehicles still use lead-acid batteries, similar to traditional batteries, which are connected in series. After charging, the electricity is stored first and released directly during use. The electric vehicle battery itself is a large-capacity power supply, and its charging jack is no different from the socket used at home.

The safe voltage of the human body is 36V. If the human hand directly enters the battery jack of the electric vehicle, since the human body is a semiconductor, it should have little impact on the human body. But if you hold a metal conductor with your hands, such as the coin used by the little girl, it may have terrible consequences. Because once the conductor enters, a short circuit will be formed in an instant, and the large current formed may cause the metal body to be electrically melted, which will also hurt people.

A brand of electric vehicle dealer told the Chongqing Morning Post that the state requires electric vehicle manufacturers to label safety terms on the battery, and for the current production of electric vehicles, power jacks, etc. require corresponding protective measures.