Catastrophic failures of lithium-ion batteries are rare. When they do occur though, the consequences can be quite serious. There have been past reports of serious injuries and deaths resulting from exploding cell phone and e-cigarette batteries, for example. As such, anything we can do to make lithium-ion batteries safer should be done.
A group of researchers in Germany think they have come up with something. They have devised a non-contact way of measuring the charge state of a battery using magnetic fields. They say their method can also be used to detect potential problems that battery makers would otherwise be unaware of.
How Batteries Work
All batteries rely on a cathode and anode (the positive and negative ends of the … Read the rest