What safety performance tests are required for electric vehicle lithium batteries?

After the development and consumption concept guidance in the past few years, electric vehicles will usher in a rapid development period in 2023 under the guidance of the national policy of developing new energy vehicles. Some consumers may have concerns about the safety of lithium batteries. In fact, electric vehicles have many strict tests on lithium batteries in terms of safety standards. As a new product development and daily batch sampling, many careful tests will be done to ensure the performance and safety of lithium batteries.

If the vehicle fails the safety test, it is very dangerous to drive on the road. The safety indicators of power batteries must not be compromised. Safety test standards are particularly important for improving the safety level of power batteries. Based on the above-mentioned analysis of power battery safety issues, there is an urgent need for corresponding safety technical test standards. The standards for power battery safety testing currently used in China mainly include: GB/T31485-2015 mainly assesses the safety indicators of power battery cells and modules, and provides a series of safety requirements and inspection specifications for abuse and extreme situations around the protection of chemical energy. GB/T31467 focuses on the inspection specifications of battery packs or battery systems. GB/T31467.3-2015 mainly makes clear provisions for safety requirements and test methods. Combined with GB/T31485-2015, it constitutes a complete chemical energy protection specification from battery cells, modules, to power battery packs and power battery systems. At present, the relevant test standards for power batteries are generally stricter than those abroad.

GB 38031-2020 "Safety Requirements for Power Batteries for Electric Vehicles" is a commonly used standard. Let's take a look at the items:

Battery cell, battery pack or system test items