How Lithium Batteries Become a Workplace Hazard – Lion Technology


A battery can catch fire due to an internal short circuit. When a short circuit occurs, it causes overheating of the cells within a battery, which can ultimately lead to a condition known as “thermal runaway”, which doesn’t typically confine itself to just one cell. Increasing pressure and temperature within a cell can cause it to explode and vent its contents. This can lead to neighboring cells going into thermal runaway as well.

Lithium fires are unique in that they are not typically extinguished in the same manner as ordinary combustible fires. Depending on the type of battery, non-traditional extinguishing agents, such as halotron or copper powder, may be needed. A lithium metal fire is treated differently from a lithium-ion fire in that each requires different firefighting agents.

See more information at via How Lithium Batteries Become a Workplace Hazard – Lion Technology.

How Google’s Autonomous Car Passed the First U.S. State Self-Driving Test – IEEE Spectrum

How Google’s Autonomous Car Passed the First U.S. State Self-Driving Test – IEEE Spectrum.

“Perhaps overly cautious approaching some lights,” he wrote. The other column shows that Google’s car was not tested on roundabouts. There were similar checks for railroad crossings, unpaved roads, school zones, and shopping centers. In communication with the Nevada DMV before the test, Google said its policy was to prohibit autonomous operation at railroad crossings that lack signals and for human drivers to take over. It also noted: “[Roundabouts are] particularly challenging, where many drivers don’t know the proper rules in the first place.” In an e-mail to colleagues at the DMV, Breslow wrote, “We can’t fail an applicant for not being able to navigate a traffic circle if they say that there [sic] vehicle can’t yet do it.”

What would the Prius do when confronted by something unexpected? That happened several times during the 22-km test drive. At one point, a bicycle weaved in front of the car. The car backed off before passing the cyclist safely. The Prius also correctly anticipated a pedestrian running across the street. Construction work, however, proved trickier. When faced with a partially blocked-off road, the car switched between autonomous and manual modes and then braked to a halt, requiring  the safety driver to take control. Wojcik also recorded that the car needed driver assistance with some turns, although she did not note the circumstances.

%d bloggers like this: