Samsung Note7 battery was banned by airlines for explosion

Due to the recent occurrence of abnormal heat and self-burning of Samsung Galaxy Note7 mobile phones in the world, the Civil Aviation Authority issued regulations on the ban on carrying Samsung GalaxyNote7 mobile phones on October 27, and strictly prohibited passengers and crew members to carry Samsung Galaxy Note7 mobile phone by hand or luggage. It is strictly forbidden to put the Samsung Galaxy Note7 mobile phone in checked baggage. It is strictly forbidden to accept the Samsung Galaxy Note7 mobile phone as air cargo. The major airports have also increased their inspections of Samsung Galaxy Note7, and also announced the full ban by airlines on Samsung Galaxy Note7.

Explosion from Samsung Note7 onspecial regulations for lithium batteries

The Samsung mobile phone is because the built-in lithium battery is prone to overheating and causing an explosion. What kind of monster is the lithium battery? In fact, this lithium battery has the advantages of light weight, long service life, large capacity, etc. At the same time, it is extremely unstable. In the friction, extrusion or battery discharge, the internal chemicals will decompose, generating excessive lithium oxide, and thus burning, and Generate more lithium oxide, and so on. The chemists call it thermal runaway, and ordinary people see it on fire. Therefore, the US Transportation Security Administration (TSA) recommends that aircraft passengers carefully place the battery in their carry-on baggage rather than consign. China also issued the "Announcement on the Regulations for Carrying lithium batteries in Civil Air Passenger Baggage" in 2011.

Explosion from Samsung Note7 onspecial regulations for lithium batteries

Maybe you will say that this is awkward, can such a small mobile phone not be extinguished? This is really wrong. I will listen to you from a professional point of view.

From the perspective of the aircraft design itself, all critical systems have sufficient redundancy, that is, even if a critical system fails, there will be spare or emergency systems to supplement, not to cause the plane crash due to critical system failure. The probability of simultaneous failure of all critical systems and backup or emergency systems is already very small and can be considered almost impossible. But the only fire, no aircraft can accurately describe how much fire can be prevented, especially in the cabin or cargo compartment.

Because the fire cannot be quantified, the composition of combustibles is ever-changing. Although fire types can be classified from the perspective of combustibles, no aircraft manufacturer can give a quantitative standard to the fire, and promise what kind of fire the aircraft can withstand and how long it will take. Take this lithium battery fire, we have no good fire extinguishing tools, only to continue its physical cooling and monitoring.

Fires have several hazards to the human body, such as lack of oxygen, dust, heat and toxicity. The hazard to the aircraft is mainly the system that may burn the aircraft, causing the aircraft's critical operating system to malfunction, lose pressure, explode, and disintegrate. The fire is still fatal, causing panic and causing the plane to lose balance and crash.

It used to be a painful lesson in the history ofspecial. The little friends really have to be careful. Knowing the fire is so powerful, let's talk about how to prevent it.

Aircraft cabin fire protection is highly valued by the relevant civilspecial authorities in various countries, and a large number of regulatory provisions regulate the use of cabin fireproof materials. In the cabin, fireproof materials are used for trolleys, seat cushions, wall insulation and sound insulation materials.

Taking the seat cushion as an example, it mainly consists of a decorative sleeve, a fire barrier layer and a foam core. Decoration set of generally made of wool fiber, wool ignition temperature is 570-600 ℃, burning low calorific value, have certain flame retardant. The fireproof layer is mainly aramid 1414, which is a kind of refractory material. The foam core is made of soft polyurethane foam.

The FAA provides for a seat cushion burn test to evaluate the flame resistance and weight loss performance of an aircraft seat cushion in a high strength, open flame. The test requires that at least two-thirds of the total test group be burned to a length of not more than 43.2 cm, and the average burnt length shall not be greater than 43.2 cm, and the average weight loss percentage shall not exceed 10%.

Explosion from Samsung Note7 onspecial regulations for lithium batteries

Having such a good environment may not be foolproof. Therefore, some regulations must be strictly adhered to. The charging treasure belongs to lithium battery polymer storage equipment, which is equivalent to a large-capacity lithium battery equipment backup battery, and mobile phones, iPads, and notebook computers. Like a lithium battery contained in a camera, a video camera, etc., it is easy to cause spontaneous combustion after being exposed to heat in a high-altitude environment. If the lithium battery is directly transported into the baggage and the baggage is squeezed or collided in a small cargo space, the lithium battery will spontaneously ignite, which seriously threatens flight safety.

About lithium batteries: cannot carry more than 160 watts of time; over 100 watts · but not more than 160 watts, with the approval of the airline can bring less than two.

About charging treasure: 100 watts or less, you can carry two with you; 100-160 watts · hour (including) can be carried with you, but must be insulated and packaged, and approved by the airline. Usually, the airport security check does not allow the charging treasure without clear capacity identification to pass the security check, so do not buy without clear identification.

Then maybe you will ask why the laptop has to go through security checks alone?

X-ray scanners at airports have two arrays of detectors that detect high-energy and low-energy gamma signals. By comparing high-energy and low-energy signals, they can get the effective atomic Numbers of the objects being examined, and thus distinguish between metals, organics and mixtures.

Laptops, on the one hand, contain a large number of electronic components, which may cause interference to X-ray imaging; on the other hand, the structure is complicated, so that the superimposed image that appears on the screen is unclear. If it is placed in a luggage bag, It is possible to make a false judgment and give the criminals a chance.

Seeing here do you better understand thatspecial safety is in every detail? Every civil servant has a safe responsibility and care for your journey. The safety of civilspecial still depends on the common maintenance of all of us.

The page contains the contents of the machine translation.