In recent years, with the rapid development of electric vehicles, how to solve the safety problems brought by electric vehicles has become a new topic and difficulty in the automotive industry. Since people have a process of cognition of new things, it is inevitable that there will be doubts and distrust at the beginning. Therefore, any safety accidents involving electric vehicles will lead to public doubts about the safety of electric vehicles and hinder the safety of electric vehicles. Development and popularization.
In fact, the fire accidents caused by collision or spontaneous combustion of traditional fuel vehicles have occurred many times every year in the world, and there are also many serious casualties, which will not cause widespread public concern and doubt. The public is so sensitive to the safety accidents of electric vehicles. In addition to electric vehicles, accidents are often accompanied by "special effects" such as fire, sound, light, and smoke. The important reason is that the "battery" is a high-energy carrier. Fear. The cell phone battery is exploding, and there are still things that hurt or even kill people. What about the huge electric car battery?
Electric vehicles (including hybrid vehicles) have many similarities to traditional fuel vehicles, with some differences. There is basically no difference in its operating conditions, use environment, body structure, internal and external modeling, etc. The biggest difference lies in the driving mode and the source of energy. Because of the introduction of electric drives, there are risks such as "shock" and "short circuit" because of the presence of high energy carriers, there is a risk of fire and explosion caused by instantaneous energy release (obviously not what we expect). Because of the stability of the chemical battery itself, there are many risks beyond the “traditional†perception of people.
New things are always fragile, subject to all kinds of suspicions, let alone vehicles that are closely related to personal safety? I am willing to make a bet on my own life to try and accept unreliable and unsafe products. I think it is a minority after all. Therefore, whether it is national-level regulations and standards, or enterprise-level product and technology research and development, we must be people-oriented, effectively solve product risks and hidden dangers, eliminate people's doubts, and promote the development of new energy vehicles. We, there is no reason to take immature and unreliable products, to fool the public and consumers, to serve the personal interests of enterprises or individuals. The safety elements of the power battery will be analyzed in detail from the parameters of the power battery.
First, the composition of the power battery system
As one of the power sources or power sources of electric vehicles, power battery systems are usually composed of a cell, a battery management system (BMS), a cooling system, a harness, a housing, and a structural member. Mechanicalparts) and other related components, as shown below:
It can be seen that the composition of the power battery system is quite complicated, including chemical objects such as batteries, complex electronic and electrical systems and thermal management systems, as well as traditional mechanical components, which involve a very wide range of specialties. Many, coupled with the harsh operating environment, are also facing a wide range of security risks.
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