The rapid development of the electric vehicle market, power Battery as its core component, it plays a vital role. However, in recent years, there have been some problems in the field of electric vehicle power batteries, which have attracted people's attention. Therefore, AQSIQ conducted in-depth investigation and research on electric vehicle power batteries and found three major problems. This article will see-through these three problems in order to better understand and solve the challenges faced by electric vehicle power batteries.

I. Potential safety hazards

1. short circuit of Battery: during the use of electric vehicle power battery, short circuit of battery may occur, resulting in safety accidents such as overheating and fire of battery.
2. Battery overcharge/overdischarge: if the power battery of electric vehicle is not properly controlled during charging or discharging, it may lead to overcharge or overdischarge of the battery, thus posing a threat to the safety of the battery.
3. Battery material problem: the materials in the power battery, such as cathode material and electrolyte, may cause potential safety hazards if the quality is not closed, resulting in battery performance degradation or serious accidents.

II. Life and cycle problems

1. unstable service life: the service life of electric vehicle power batteries is unstable to some extent. Some batteries may suffer from rapid capacity attenuation during normal service time, which affects the endurance of electric vehicles.
2. Cycle performance attenuation: after the long-term charging and discharging cycle of electric vehicle power battery, the cycle performance may decrease, which leads to the shortening of battery life, thus affecting the performance and reliability of electric vehicle.
3. Influence of temperature on life: the use of electric vehicle power battery in high temperature environment will easily lead to the shortening of battery life, so it is necessary to strengthen the monitoring and control of battery temperature.

III. Recycling and reuse

1. poor recycling channels: the recycling channels of electric vehicle power batteries are not perfect, resulting in some waste batteries that cannot be effectively recycled, causing potential pollution risks to the environment.
2. Difficulty in secondary utilization: the secondary utilization of power batteries is also one of the challenges faced by electric vehicle power batteries. Further research and exploration are needed on how to realize the effective reuse of batteries and reduce the waste of resources.

Electric vehicle power battery has some problems in safety, service life, cycle performance, recycling and so on. In order to solve these problems, AQSIQ has put forward a series of supervision and management measures, including strengthening the quality supervision of electric vehicle power batteries, perfecting recycling channels, strengthening the research on battery recycling and reuse, etc. At the same time, electric vehicle manufacturers and relevant R & D institutions should also Plus-Sized R & D efforts to improve the safety, service life and cycle performance of electric vehicle power batteries, and actively promote the sustainable development of electric vehicle power battery industry. Only in this way can we further promote the healthy development of electric vehicle industry and contribute to environmental protection and sustainable development.