https://cleantechnica.com/2018/02/14/new-video-takes-inside-tesla-2170-battery-cell/ New Video Takes You Inside A Tesla 2170 Battery Cell February 14th, 2018 Steve Hanley
[image https://c1cleantechnicacom-wpengine.netdna-ssl.com/files/2018/02/Tesla-Battery-Cell-Comparison-570x397.jpg Tesla 2170 battery cell comparison video https://youtu.be/_uKpn3zflBE What's inside a Tesla Model 3 Battery? ] YouTuber Aries RC posted a video recently in which he dissects what he claims to be a Tesla 2170 lithium ion battery cell — the cell that goes into the battery pack of the Model 3. He says the cell came from the Tesla Gigafactory. Check out the comments to the video and you will discover some skepticism about whether this is in fact a Model 3 cell made by Panasonic or one used in Tesla’s energy storage products made by Samsung. But let’s put such quibbles aside and focus on what the video shows instead. First, Aries RC places the 2170 cell alongside an 18650 cell used in the Model S/Model X cars. Keep in mind that the volume of a cylinder increases geometrically with diameter. Even though the new cell is only a little bit larger, it is capable of storing about 30% more power than its smaller sibling. After discharging the cell, Aries RC carefully removes the top to reveal a blue plastic insulator that keeps the internal components of the cell — popularly known as the “jelly roll” — from contacting the top and shorting out. A similar insulator is used at the bottom of the cell. After carefully removing the jelly roll, Aries RC sliced the exterior aluminum open to reveal a thin layer of plastic on the inside that acts as an insulator to help control internal temperatures. The top of the cell also has three tiny vent holes to allow gases to escape if the cell overheats. The jelly roll itself is a tightly rolled piece of copper nearly 32? long. In between the layers of coiled copper is the lithium nickel cobalt aluminum oxide mixture that actually stores the electrical charge. Aries RC notes that the ground wire connected to the copper coil is tap welded. He says this is significant because tap welding is extremely difficult to do on metal as thin as the copper used inside the 2170 cell. Put thousands of these cells together into modules and then completed battery packs, figure out how to keep everything cool during driving and charging, and you have the makings of an electric car. In Tesla’s case, make that a groundbreaking, class-leading, industry-disrupting electric car. [© cleantechnica.com] + https://www.farm-equipment.com/blogs/6-opinions-columns/post/15127-ahead-of-the-curve-sodium-battery-could-hasten-electric-vehicles Ahead of the Curve: Sodium Battery Could Hasten Electric Vehicles Feb 10, 2018 In the January issue of Farm Equipment we explored the variety of fuels and technology that will power farm equipment during the mid-21st Century and beyond. Electricity promises to be a major player ... electrical technology will power off-road ... The UT sodium battery allows for a greater number of charging and discharging cycles, which equates to longer lasting batteries, plus they can be charged much faster (minutes vs. hours) than current EV batteries ... https://www.electricvehiclesresearch.com/articles/13738/sodium-battery-could-provide-cheap-effective-lithium-alternative Sodium battery could provide cheap, effective lithium alternative February 14, 2018 ... Sodium-ion batteries might soon provide a less expensive, viable alternative to lithium-ion batteries thanks to research developed at Washington State University. More information can be found in the IDTechEx report on Advanced Li-ion & Beyond Li-ion Batteries ... https://www.idtechex.com/research/reports/advanced-li-ion-and-beyond-li-ion-batteries-2018-2028-000566.asp For EVLN EV-newswire posts use: http://evdl.org/archive/ {brucedp.neocities.org} -- Sent from: http://electric-vehicle-discussion-list.413529.n4.nabble.com/ _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
