THREE NEW CHINESE NATIONAL STANDARDS FOR ELECTRIC VEHICLES OFFICIALLY RELEASED

THREE NEW CHINESE NATIONAL STANDARDS FOR ELECTRIC VEHICLES OFFICIALLY RELEASED

RELEASE DATE:2020-05-26 14:32
ABSTRACT: Chinese annual production and sales of new energy vehicles have ranked first in the world for many years, and the industry has steadily entered a growth period. In order to ensure the safety of consumers and realize the sustainable and healthy development of the industry, on May 12, 2020, GB 18384-2020 "Safety Requirements for Electric Vehicles", GB 38032-2020 "Safety Requirements for Electric Buses" and GB 38031-2020 The three mandatory national standards of "Safety Requirements for Automotive Power Batteries" were officially released and will be implemented on January 1, 2021. The three standards are the first batch of mandatory national standards in the field of electric vehicles in China, and they are also the basic requirements for new energy vehicle products to be approved.



BRIEF ANALYSIS OF THREE NEW MANDATORY GB STANDARDS

No.
Standard number
Name
Standard number replaced
Implementation date
1
GB 18384-2020
Electric vehicles safety requirements
GB/T 18384.1-2015
GB/T 18384.2-2015
GB/T 18384.3-2015
2021-01-01
2
GB 38031-2020
Electric vehicles traction battery safety requirements
GB/T 31485-2015
GB/T 31467.3-2015
2021-01-01
3
GB 38032-2020
Electric buses safety requiements

2021-01-01

As the first batch of mandatory national standards in the field of electric vehicles in China, many industry-leading car companies, bus manufacturers, battery manufacturers, and testing centers participated in the drafting of standards. Based on China's original recommended national standards, it is fully in line with the United Nations Global Technical Regulations on Electric Vehicle Safety (UN GTR 20), which was led by China. Compared with the old national standard, it further improves and optimizes the safety technical requirements for electric vehicles and power battery products.

"Electric vehicles safety requirements" stipulates the safety requirements and test methods for electric vehicles. It is applicable to electric vehicles with a maximum operating voltage of on-board drive system of Class B. It is not suitable for road vehicles that are continuously connected to the grid during driving. The new standard mandates insulation resistance monitoring, adds REESS thermal event alarm requirements, optimizes insulation resistance measurement methods, and adds verification tests for insulation monitoring functions. This standard will become one of the important basic standards for the safety performance testing of electric vehicles in China and the mandatory technical basis for the mandatory inspection of new electric vehicle stereotypes and the inspection of imported motor vehicles.

"Electric vehicles traction battery safety requirements" applies to rechargeable energy storage devices such as lithium-ion batteries and nickel-metal hydride batteries for electric vehicles. Only the most basic safety requirements for power battery cells, battery packs or systems for electric vehicles are considered to provide personal protection, not involving production, transportation, maintenance and recycling safety, nor performance and functional characteristics. In terms of the thermal safety of the battery system, the new standard specifically adds the thermal diffusion test of the battery system: after the battery cell thermal runaway occurs, the battery system will not fire or explode within 5 minutes, and a safe escape time is reserved for the occupants.

"Electric buses safety requiements" apply to M2 and M3 electric buses, including pure electric buses and hybrid buses, but not to fuel cell electric buses. The new standard improves the special waterproof and dustproof, fireproof, rechargeable energy storage system, charging and other safety requirements and test methods of electric passenger cars, and adds the thermal runaway test requirements for the smallest battery management unit.

Newly-applied model approvals will be implemented from the date of implementation of the standard, and models that have received type approval will be implemented from the 13th month of implementation of the standard.

NEW STANDARD TEST PROJECT ANALYSIS
“Electric vehicles traction battery safety requirements" as an example:
No.
Test items
Testing object
Safety requirements
Remarks
1
8.1.2 Over discharge
Battery cell
After the test, there is no fire or explosion.
Follow GB/T 31485
2
8.1.3 Overcharge

3
8.1.4 External short circuit
Follow GB/T 31485
4
8.1.5 Heating
Follow GB/T 31485
5
8.1.6 Temperature cycling
Follow GB/T 31485
6
8.1.7 Extrusion


No.
Test items
Testing object
Safety requirements
Remarks
1
8.2.1 Vibration
Battery pack or system
After the test, there is no leakage, shell rupture, fire or explosion, and does not trigger abnormal termination conditions. After the test, the insulation resistance should not be less than 100Ω / V.

2
8.2.2 Mechanical shock
After the test, there is no leakage, shell rupture, fire or explosion, and the insulation resistance after the test should not be less than 100Ω / V.

3
8.2.3 Simulate collision
Follow GB/T 31467.3
4
8.2.4 Extrusion
After the test, there is no fire or explosion.

5
8.2.5 Damp heat cycle
After the test, there is no leakage, shell rupture, fire or explosion, and the insulation resistance within 30 minutes after the test should not be less than 100Ω / V.
Follow GB/T 31467.3
6
8.2.6 Submerged
Method 1: Salt water immersion
Method 2: IPX7

Battery pack or system after passing the 8.2.1 vibration test
Method 1, there should be no fire or explosion;
Method 2: After the test, the requirements of IPX7 must be met. There should be no leakage, cracked casing, fire or explosion. The insulation resistance after the test should not be less than 100Ω / V.

7
8.2.7 Thermal stability
8.2.7.1 External fire
8.2.7.2 Thermal diffusion

Battery pack or system
External fire, it should not explode;
Thermal diffusion occupant protection analysis and verification. The battery pack or system shall provide a thermal event alarm signal 5 minutes before thermal diffusion due to thermal runaway of a single battery, which in turn causes a danger in the passenger compartment.

8
8.2.8 Temperature shock
Same with 8.2.3
Follow GB/T 31467.3
9
8.2.9 Salt spray

10
8.2.10 High altitude
Same with 8.2.1
Follow GB/T 31467.3
11
8.2.11 Over temperature protection
Battery system

12
8.2.12 Overcurrent protection
Battery system that can be powered by an external DC power supply

13
8.2.13 External short circuit protection
Battery system
Same with 8.2.3

14
8.2.14 Overcharge protection
Same with 8.2.1

15
8.2.15 Over-discharge protection
Same with 8.2.3


SERVICES PROVIDED BY ATIC
Inspection and pre-test of national standards for electric vehicles and power batteries
Preparation of a full set of application materials
Factory audit counseling, accompanied throughout
Certification bodies work closely together without barriers to communication

ABOUT ATIC
ATIC is a young technical service company from China, established in 2015. ATIC is committed to integrate domestic and international regulations, testing and certification resources with a global perspective in the context of globalization, and establish a new, specialized regulation research, testing and certification platform. With innovative Digital Reporting System (DRS), Customer Service Platform (CSP) and self-developed Global Vehicle Regulation Database (GVRD), ATIC’s compliance service covers more than 54 countries/regions globally, testing and certification service covers more than 30 countries/regions worldwide. ATIC serve more than 3,300 manufactures each year.


ELECTRIC VEHICLES CCC CERTIFICATION PLEASE CONTACT

Rachel
Rachel Huang
Asia Homologation Department
Rachel graduated from INSA de Rouen, France in the major of Energy & Propulsion Engineering with MSc degree.
 In ATIC she is focused on Asian automotive regulation and homologation system research.
Phone: +86 15608070157
Mail: rachel.huang@atic-cn.com