GB/T 31486-2015 "electric performance requirements and test methods of lithium-ion batteries for electric vehicles" is China's national standard for electric performance of lithium-ion power batteries for electric vehicles, which was released on May 15, 2015. This standard aims to standardize the electrical performance requirements and test methods of lithium ion batteries for electric vehicles, so as to ensure the safety, performance and reliability of electric vehicles. This article will analyze the national standard in detail, including its background significance, main content and importance to the electric vehicle industry.

I. Background significance of the standard:

with the rapid development and popularization of electric vehicles, lithium-ion power battery, as the main power source of electric vehicles, the stability and reliability of its electrical performance are crucial to the performance and safety of vehicles. Through the formulation of GB/T 31486-2015 standard, the electrical performance requirements and test methods of lithium ion batteries for electric vehicles can be unified, the quality level of battery products can be improved, and the healthy development of electric vehicle industry can be promoted.

II. Main contents:

1. scope: GB/T 31486-2015 standard applies to the electrical performance requirements and test methods of lithium ion batteries for electric vehicles.
2. Terms and Definitions: the terms and definitions involved in the standard are clearly defined so as to be understood uniformly during the implementation of the standard.
3. Electrical Performance Requirements: including the rated voltage, rated capacity, cycle life, charge and discharge performance, safety performance and other requirements of the battery.
4. test Method: The test method and procedure for testing the electrical performance of lithium ion batteries for electric vehicles are described in detail to ensure the accuracy and reliability of the test results.
5. Test Report: The standard requires that after the battery is tested, a test report should be prepared to record various electrical performance indexes and test results of the battery.

III. Importance to the electric vehicle industry:

1. to ensure the safety of electric vehicles: by strictly regulating the electrical performance requirements and test methods of lithium ion batteries for electric vehicles, the safety and stability of batteries can be improved and the safety risks can be reduced.
2. Promote the progress of battery technology: the formulation of standards promotes the progress and innovation of lithium ion power batteries for electric vehicles, guides enterprises to strengthen product research and development, and improves battery performance and energy density.
3. Promoting industrial development: the implementation of standards is helpful to improve the quality level of lithium ion power batteries for electric vehicles, enhance the international competitiveness of China's electric vehicle industry, and promote the healthy and rapid development of electric vehicle industry.

GB/T 31486-2015 《 lithium ion battery for electric vehicles electrical Performance Requirements and test methods "is the national standard for the electrical performance of lithium ion power batteries for electric vehicles in China, which is of great significance for standardizing the production and application of lithium battery products for electric vehicles. Through the implementation of this standard, the safety, performance and reliability of electric vehicles can be further improved, and the sustainable development of electric vehicle industry can be promoted.