US Sandia National Laboratory conducts lithium ion battery drop and impact test

- Oct 25, 2019-

According to foreign media reports, a press release issued by Sandia National Laboratories recently indicated that the laboratory is conducting a drop test of lithium-ion batteries to learn more about how the battery responds to the impact pressure, lithium tested. Ion batteries will withstand more than 200 pounds of impact, which will help to understand the damage and impact of electric car batteries in a car accident.

Sandy battery abuse test engineer Chris Grosso said, "This is the ninth way we test and destroy batteries. This kind of impact is very big, we even broke the battery a few pieces."

The laboratory's mechanical engineer, June Stanley, said that the ever-increasing battery energy storage system and power requirements are driving demand for battery testing, such as drop testing.

Stanley said, "As far as we know, no other agencies in the United States have conducted such drop tests or impact tests. The data we collect will help develop safer, more reliable batteries and study more efficient performance. Helps respond to emergencies such as electric car crashes."

“The impact tests like this are more realistic and can show what is going to happen. Such tests will give us a better understanding of how the fire department handles emergencies, and it is also good for industrial research and development of new technologies,” she said.

The battery drop test tower on Sandia National Laboratories Day was built in a 14-foot-tall hangar-style building. If the tested battery is on fire, the generated smoke can be easily ventilated and cleaned. The researchers remotely controlled the tower equipment and watched the test through a monitor inside a trailer parked 30 meters away.

The tested battery was placed in a steel tray bolted to the load cell to measure the impact force at the bottom, and an impact force of more than 200 pounds required to be raised to a height of 8.8 feet. The researchers released the tray by pressing the button and the battery began to fall. Researchers measure speed, gravity, temperature, and voltage through sensors connected to batteries and towers. A nearby camera records the damage caused by the fall and impact. This data is delivered synchronously to the computer in the trailer.

So far, the lab's research team has conducted a single-cell lithium-ion battery and a battery pack drop test consisting of 12 batteries. Stanley said that in these drop tests, although the batteries tested did not produce sparks and heat, they collected a lot of useful data. After the battery is dropped, its internal state is not stable, and about half of the battery cannot be used normally. “This situation helps to better understand how firefighters will handle this situation,” she said.

Grosso said, "In the test, we found that the power to break, crush or shred the battery is 500 pounds. If necessary, we can easily upgrade to get more impact."