Electric car batteries also need to be tested.

Electric car sales in China become the world's largest country in 2015, so that people pay more attention for the safety of electric cars. From time to time in the press of the electric fire report, individual people worry about the radiation, which not only bothers enterprise, but also makes the consumer be confused.

Is it safe to electric cars, or to be exact, battery safety? Tank and oil and gasoline vehicles, it also needs to pass the safety of the strict test and inspection. The reporter interviewed some enterprises and researchers.

For the question of whether currently used in electric vehicle battery has radiation, China's BYD Company Limited chairman Wang Chuanfu said: "this worry is superfluous, our products are accord with national laws and regulations...Frankly we bus voltage is 750 v, actually like Beijing and Shanghai friends we sit subway, the subway voltage is 1500 v, almost twice as high, take the subway is not worried about electromagnetic interference, then take the bus more don't have to worry about. So please rest assured, take electric bus is safe."

The Chinese academy of sciences "long life power lithium battery" Project chief scientist Li Hong think, electric radiation such rumors have objective on the basis of investigation is needed.

Battery in dc power supply, he says, in theory, of course, will produce electromagnetic radiation, but according to relevant standards and regulations, external battery package used for radiation shielding material, should not have radiation leak from a technical level. But if there is something wrong with the car, such as a bump on the relevant parts, although does not affect the operation, but in the area of electromagnetic shielding with leakage, that's a question. For the solution, "to the 4 s shop maintenance vehicle check electromagnetic shielding case, by the way, it is not difficult, don't even trust of consumers themselves using a hand-held instruments can detect."

Limit to the security of electromagnetic radiation, the world health organization (who) standards is calculated on magnetic induction intensity of less than 100 mu T (micro tesla), China has adopted the standard. Some countries still need to put some wider, such as the UK is 200 mu T.

The safety of the electric vehicle battery not only refers to electromagnetic radiation. At present in China power battery security has 20 test items, all through. Related business is the main concern of the battery thermal runaway, blowdown, fire and explosion. In system design, must through the battery management system, the fuse protection, structural integration method to set up multiple security. In the process of battery and vehicle matching, pass good durability experiment certification.

In practical application, or the occasional electric fire cases. In December 2015, for example, a electric bus burst into flames in Hong Kong, may be short circuit. The "star" in the electric tesla is expensive, so-called safety guaranteed, but also in January in Norway charging a fire accident happened.

The government has always attached great importance to safety in the electric. Miit announced in January, for security reasons, suspended the ternary lithium battery passenger car in a new energy automobile application recommended models directory. Miit said, ternary lithium battery energy is high, the cycle performance is good, is an important development direction of the future lithium batteries, but in this field late in our country, for the safety of the passenger development and validation is not enough, also need more security assessment. Before the review completed, suspend the ternary lithium battery bus listed in the recommended models directory.

Now the mainstream lithium ion batteries because of the different materials can be divided into, ternary lithium, lithium iron phosphate acid lithium manganese acid lithium, nickel, and other types, researchers are developing new type of solid state lithium batteries. It will replace from liquid to solid electrolyte, which had the very big promotion in the safety performance. Launch test of electric vehicles such as Paris, France is using solid state lithium battery. In a riot, a car was set fire to, but found the battery after burn. Li Hong said, this example illustrates the new battery has good security.

In the electric quantity more and more today, absolute number of electric vehicles related accidents could gradually rise. But as a traditional gasoline car will also be some accident, should be more focus on electric vehicle security from the view point of probability, simply think "rogue" the battery is a huge misunderstanding.

The page contains the contents of the machine translation.