18650 Lithium Battery Charger, Intelligent Double Tank to Prevent Overcharge, Prevent overcurrent, Prevent Overpressure (Accessories)

[Music] lithium batteries have a high energy density so they can store a lot of energy in a small volume but they can go up and smoke when bad things happen in this short video we'll show you what can happen during one of those bad things over charging excessive charging can bring on thermal runaway enough with ium battery most lithium batteries contain special circuits to prevent this problem here are a few examples of these circuits the two long narrow circuit boards are typical of what you find inside a lithium power pack as might sit inside a laptop computer the little pouch type battery which is from a toy has one too but for this demonstration we've removed the protective circuits for our test we've connected a DC power supply across a lithium battery the same way as a battery charger would be connected the maximum charge voltage for lithium cells it's usually on the order of four