According to Jeff Dahn, high temperatures aggravate the parasitic reactions that occur in a lithium-ion battery’s electrolyte, while high charge levels result in extra performance for a few cycles, followed by a crash in performance and much faster deterioration of the cell.įortunately for us, both of these factors can be controlled to make batteries last as long as possible. high charge level)īoth of these contribute to faster death of lithium-ion batteries. Increased time spent at high voltages (i.e. There are basically two main factors that speed up the inevitable death of your battery: What causes these parasitic reactions to kill lithium-ion batteries? His lecture is over one hour-long, but is well worth it if you’re a battery nerd like me. Jeff Dahn is the leader of Tesla’s battery research partnership with Dalhousie University, and his student protegé now leads Tesla’s battery longevity program. If you want to learn more specifics about the death process of lithium-ion battery cells, I highly recommend watching Professor Jeff Dahn’s lecture on the subject. This is of course a seriously over-simplified explanation, but it’s enough for now, as we just want to know how to avoid this parasitic reaction, or at least slow it down in order to keep the battery alive for as long as possible. The short answer is that basically, during every charge and discharge cycle, very small parasitic reactions occur between the electrolyte and the electrodes inside a lithium-ion battery cell, building up over time and reducing the amount of energy the cell can both store and output. In order to understand how to increase the life of lithium-ion batteries, we first have to understand why they die. Join Electrek as we take a look at why lithium-ion batteries die, and how you can increase and even double the lifespan of your batteries. So it makes sense that you’d want to ensure your batteries live as long and happy a life as possible. Lithium-ion batteries are expensive, and large battery packs such as those in everything from electric cars to electric motorcycles and e-bikes usually make up the single largest cost of the entire vehicle.
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