Requirements and testing standards for Automotive Battery Specification

- Mar 01, 2017-

Battery manufacturers or vehicle manufacturers in the battery product design verification stage need to take into account a variety of possible collision safety risks, thus setting the corresponding solution. With the progress of technology and the accumulation of experience, there are a lot of standards and regulations to regulate the security of these batteries. For example, SAE J2464, J2929, J2380, ECER100. Our country has also developed a corresponding national standard, for example, GB/T 18384-2015, 31467.3-2015, 31498-2015. These standards and regulations introduced all kinds of test methods for simulation of mechanical and electrical hazards cell system under different environments may encounter, and in each of the tests, standards and regulations usually require battery leakage, rupture, fire and explosion, some project requirements of insulation resistance should be greater than 100 ohm / V or more.          

Common safety tests include:          

Vibration          

Thermal shock          

Mechanical shock and impact          

Fire protection          

External short circuit          

Overcharge protection          

Over temperature protection          

In the crash test of the vehicle level, the FMVSS 305 (Federal Motor Vehicle Standard No.305), which is required for the collision test of the battery, is a classic test rule for the safety of the battery:          

The energy storage system does not invade the passenger compartment and can be kept in its original location          

The insulation level of the energy storage system shall not be less than 500 ohms per volt          

Leakage of the electrolyte can not enter the passenger compartment, and the passenger compartment leaked electrolyte should not exceed 5L          

Due to the power battery with its own energy, so the electric vehicle crash test, in addition to traditional car collision safety preparation needs, safety issues for electric cars IIHS also recommended other needs to be confirmed, for example:          

Manual switch position          

Energy storage system mounting position and high voltage wiring harness          

Detecting the connection position of insulation resistance test circuit of energy storage system          

Charging and discharging method of energy storage system          

Chemical properties of battery coolant          

Battery and its components MSDS          

For testing the special hazard information of electric vehicle energy storage system          

The Volvo touch had a vehicle, the battery is not installed in the trunk and the occurrence of serious deformation by vertical collision as expected, but with the battery mounting body structure connection part of the serious deformation of the battery arch up, this reduces the battery by the pressure to a certain extent on the battery in the collision process did not have a similar figure 4 serious extrusion, the reasonable design of the body structure can be reduced to some extent. By the risk of collision between the battery. Lenovo to GB/T in section 7.6 of 31467.3-2015 extrusion experiment requires the development process, there have been disputes in 200kN pressure requirements, many companies reflect the pressure too big, do not accord with the actual situation of the vehicle design. The implementation of a period of time in the standard, GB/T has released the first 31467.3-2015 modify list, accept the feedback standard organization of enterprises, considering the body structure for the protective effect of the battery, will lower the requirements of 200kN to 100kN, this also with the current international ECE R100 and ISO12405-3 requirements remain the same, this also reflects the national standard in the progress of power battery regulations.