Battery safety is the electric vehicle world-class problem

Battery safety is the electric vehicle world-class problem

Battery safety is the electric vehicle world-class problem

a car accident caused the fire, killing three innocent lives. Electric vehicles from the darling of solving the world energy crisis overnight everyone talking crazy “dangerous goods. In fact, electric vehicles to the case of fire or explosion by no means uncommon around the world such cases. The explosive characteristics of battery system makes the electric cars safety challenges facing the world auto industry. Then, the electric car is really unsafe? Is there a way to make it more secure it?

lithium why unsafe?

It is understood that currently used in BYD lithium iron phosphate battery is a lithium battery in one. Just come out of the lithium batteries used in mobile phones, when there is an explosion accident, lithium is too active. Later, American scientists invented the lithium iron phosphate material to some extent, inhibit its activity, a major improvement in the security of the electric vehicle.

Recently, I interviewed Wang Tianshun electric vehicles Professional Committee of China Electrotechnical Society of technical services director of the Center, he thinks that the problem the key is the battery. According to him, due to the small capacity of lithium batteries, a lithium battery electric cars will use hundreds of pieces of lithium batteries, battery management system is difficult to control the consistency of the battery, coupled with the lithium molecule is more active, even if stored in the static state explosion may occur, and therefore difficult to control security.


senior automotive commentator guxinguang, for the identification of the safety performance of pure electric vehicles, batteries and related parts account. “The electric vehicle battery safety enhancement is a process that needs to be improved in the electrode, separator and other materials, and protection technology, protect the circuit design.

about the safety of lithium batteries, Jia Xinguang that: “the activity of lithium is relatively high, inflammable, explosive, through quality control and a large number of test applications to be detected. For electric vehicle batteries, heavy weight, Jia Xinguang that “the emphasis on enhancing the driving range, easily reach 300 km, which factors from social pressure, and in foreign countries, are 40 kilometers starting life.

current lithium battery safety performance indeed inadequate, but the industry is through industrialization and technological innovation continue to enhance and improve the Wang Tianshun said, to strengthen after-sales service system,head gasket seal. we recommend regular replacement of the battery, the battery every replacement by the maintenance division of the professional conduct rigorous testing, and timely detection of problems. This shows that the lithium battery safety is still not completely overcome the problem, the basic research of the lithium-ion battery materials compatibility is still weak domestic.

lithium why burning?

Prior to this, relevant departments will be pure electric vehicles as the direction of development of the countrys new energy vehicles. Pure electric vehicles and therefore the fostering of national policy. After this, the major domestic automobile enterprises groups are basically in the field of electric vehicle R & D invested enormous human and material resources. 526 major traffic accidents, the major domestic automobile enterprises groups also began to re-examine the safety of electric vehicles. Recently, I interviewed a large Automotive Group, Institute of electric car project person in charge, let him talk about the security issues of electric vehicles. From photos of the car accident, can basically be determined is part of the battery pack burning. Analysis of 526 major accidents, the people in the industry I analyzed. In his view, the most dangerous part is the electric vehicle battery pack, and the present situation, the characteristics of the battery pack is flammable and explosive, which makes electric vehicle safety compromised: “At present, the use of electric vehicles The most mature battery is lithium ion battery. However, in theory, lithium-ion batteries can not be done completely eliminate burning.

experts have questioned that arising from either vehicle fire or E6 Yinbiyadi electric vehicle voltage system and battery design is unreasonable. Electric vehicle voltage system higher than 200 V is unsafe, high-voltage system of the BYD E6 electric car up to more than 300 volts, may not only spark in the collision in order to detonate the battery, but also make the car easier to electric shock.aluminum acetate. In addition, the BYD E6 electric car is a plug-in battery charging socket once encountered a strong force collision, positive and negative electrodes connected to short-circuit, short period of time will result in high temperature blasting.


battery safety is the worlds problems

relative to traditional fuel vehicles, the battery pack flammable The explosion of features that make electric vehicles more “fragile. The industry source said to the author, not only in China, foreign electric vehicles in the crash test combustion and even explosion is not uncommon: “The most bizarre one electric vehicles in the United States, after the collision three weeks, stopping at garage spontaneous combustion. The investigation concluded that the reason may be caused by collision electrolyte slight leakage later leakage gathered to a certain extent, the occurrence of combustion.

on how to improve the security issues of electric vehicles, the industry experts pointed out that: “the present situation, improve electric vehicle security methods in addition to the battery pack to strengthen the protection, it is difficult to have substantial technical. Because, even in the collision occurred the instant the circuit system to automatically cut off, the battery pack itself will occur in the case of external compression combustion.

In this regard, the experience of foreign countries is to use carbon fiber high-strength composite materials to be wrapped to protect the battery pack. But such a practice is too costly and difficult for the mass production of a large scale to promote the use of civilian vehicles.