Why do Li-ion Batteries die ? and how to improve the situation?
Why Electrical Engineering Stack Exchange recommends it
Electronics Stack Exchange answerers point people to it as a reference on Li-ion battery lifetime and degradation, especially in answers about electric car battery longevity.
Recommended by 0 people across 0 different months, 2016 to 2024.
What it is
A 73-minute university lecture by Professor Jeff Dahn of Dalhousie University on why lithium-ion batteries lose capacity over time and what research can do to extend their life. It is posted on the English for Science channel and is aimed at a technical audience interested in battery chemistry and degradation.
What people said
Cites Brian G · 2016-04 · Electrical Engineering Stack Exchange · on “Why is there so much fear surrounding LiPo batteries?”
To use Lipo batteries safely, you must treat them with the same respect you would anything that can store and rapidly release a large amount of chemical and/or electrical energy. The bigger the battery and the lower the internal resistance (e.g. higher C rating) the more you need to be careful. They can be used safely... just like gasoline can be used safely but to do so you must learn about how they operate and how they can fail. When you think about it, it's no surprise that, for instance, a Tesla battery has about the same level of risk as the gas tank it replaces... they both store a lot of energy that can be released rapidly when needed. Well actually, I lie somewhat because a Tesla bat
Cites Paul McErlean · 2018-03 · Electrical Engineering Stack Exchange · on “How long will electric car batteries last?”
I have included a few relevant links here for Li-ion battery life: Basically they can now quickly determine how long any type of battery will last by measuring currents and voltages very accurately during short tests (rather than testing over the entire life of the battery). Importantly, an active thermal management system (during both charge and discharge) is essential to ensure optimal battery life. Why do Li-ion Batteries die? And how to improve the situation? (31-10-2013) [this video] Similiarly this Panansonic Paper on Li-ion batteries: [LINK]
Cites MicroservicesOnDDD · 2019-06 · Electrical Engineering Stack Exchange · on “Li-ion battery life after being 'completely' discharged”
At Battery University, Safety Concerns with Lithium Ion (the last source, at the bottom), the following is said: ...Li-ion must not dip below 2V/cell for any length of time. Copper shunts form inside the cells that can lead to elevated self-discharge or a partial electrical short. If recharged, the cells might become unstable... Therefore, before you try to rehabilitate a Lithium ion battery, see if you can figure out how to test the actual voltage of the cells inside, because it may be a safety issue if any cell has fallen below 2 volts for any length of time. This may have caused the beginning of copper crystals, though I'm not sure whether they are more like Crystal Dendrites [LINK] , or
Cites MicroservicesOnDDD · 2024-02 · Electrical Engineering Stack Exchange · on “How "Zero" is this supposedly Zero-TCR resistor? And how much better is it than this other one?”
I found a resistor at Digikey, and the TCR was quoted as being 0.0ppm/°C, and I had to check the datasheet just to refute my suspicion that it was a data entry error, and it looks real, but just how real is it? Has anybody used one of these, and measured the TCR and so can confirm this specification, or at least that you have used one of these? Here's the resistor: 1K ±0.1% Non-Inductive Metal Foil Through Hole Resistor (Datasheet: VPG Foil Resistors # Y00781K00000B9L [LINK] , Digikey # 804-1061-ND [LINK] ). It has a "high" price of about $81.93 as of Feb. 19, 2024. Please contrast with (Datasheet: VPG Foil Resistors # Y16311K00000T9R [LINK] , Digikey # Y1631-1.00KACT-ND [LINK] ) having a ±0