Smoke and fire broke out in Xiaomi SU7 car. Firefighters found out the truth: it was actually related to a card

Abstract:

"China Fire" shared a case of fire in a car today, and the culprit turned out to be a very common card. It is reported that recently, a private car parked on the roadside in Daxing District, Beijing, burst into smoke and caught fire. Firefighters arrived to put out the fire after receiving the alarm. After investigation,

the cause of the fire was that the employee's chip card left on the car's wireless charging board by the car owner continued to interact with the charging coil to generate high temperatures, which ignited the items in the car

The fire department pointed out that some car owners are accustomed to placing some cards containing chips, antennas and other metal parts inside the car wireless charging pad area, but they do not know that this behavior poses huge safety risks.

The reason for this is that in-vehicle wireless charging relies on the principle of electromagnetic induction to transmit energy, and a strong alternating electromagnetic field will continue to be generated during the working process.

When this type of card containing metal parts such as chips and antennas is within the wireless charging area and the surrounding strong magnetic field, an eddy current effect will be generated under the action of the alternating electromagnetic field. The principle is similar to the heating principle of a household induction cooker, which can generate a large amount of heat in a short period of time.

The plastic shell of the card has limited heat dissipation capacity and cannot dissipate the heat in time. Once the heat accumulates rapidly and the card temperature soars, it will heat up, bulge, and deform. In severe cases, it will burst, smoke and catch fire, endangering the safety of the drivers and passengers in the car.

Firefighting reminder:

Car owners should not place cards containing chips, antennas and other metal parts inside the car wireless charging pad and surrounding areas with strong magnetic fields to prevent their car from "catching fire"

Many cards in daily life have their own chips, including ID cards, bank cards (debit cards, credit cards), transportation cards, access cards, hotel room cards, etc. If you have the habit of throwing cards into the car casually, then this case must arouse your vigilance!