{"id":6562,"date":"2019-06-19T13:47:30","date_gmt":"2019-06-19T05:47:30","guid":{"rendered":"https:\/\/battery9999.com\/%e4%b8%80%e6%96%87%e4%ba%86%e8%a7%a318650%e8%88%8721700%e9%9b%bb%e6%b1%a0\/"},"modified":"2019-06-19T14:07:23","modified_gmt":"2019-06-19T06:07:23","slug":"%e4%b8%80%e6%96%87%e4%ba%86%e8%a7%a318650%e8%88%8721700%e9%9b%bb%e6%b1%a0","status":"publish","type":"post","link":"https:\/\/battery9999.com\/en\/%e4%b8%80%e6%96%87%e4%ba%86%e8%a7%a318650%e8%88%8721700%e9%9b%bb%e6%b1%a0\/","title":{"rendered":"Tesla\u2019s new 2170 battery cell packs more power"},"content":{"rendered":"

by<\/span> Charles Morris<\/p>\n

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It sounded like a crazy idea back in the early 2000s, using \u201claptop batteries\u201d to power the Tesla Roadster. In fact however, it was quite sane. Panasonic\u2019s 18650 battery cell was an industry standard with a proven record of performance that was being produced in large numbers. While other EV pioneers such as Fisker ran into problems with proprietary battery technology, Tesla could count on a secure supply of tried-and-true cells. Since then, Tesla has steadily improved the cells, but it stuck with the 18650 format (named for its size: 18 mm in diameter and 65 mm high) for Models S and X. While other EV-makers opted for larger pouch-style cells, Tesla continued to see the 18650 cells as the most compelling option<\/a>.<\/p>\n

Above: A look at Tesla’s new 2170 battery cell (Instagram: bypantheon<\/a>)<\/em><\/p>\n

\u201cWe\u2019ve totally custom-engineered that cell, working jointly with Panasonic to create\u2026an automotive cell, tested to automotive standards,\u201d Chief Technical Officer JB Straubel told the Society of Automotive Engineers<\/a> (SAE) in 2013. \u201cIt doesn\u2019t go into laptops anywhere. What keeps us in that general shape and size is the production and cost efficiency. We\u2019re seeing price points that none of the larger-format cells are able to meet.\u201d<\/p>\n\n\n\n
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Above: Tesla’s older 18650 battery (Image: Charged<\/a>)<\/em><\/p>\n

However, all good things must come to an end. Tesla and Panasonic have now developed a new and improved type of cell, which will be used in the upcoming Model 3. The new 2170 cell, which is now being produced at the Gigafactory<\/a>, is slightly larger – 21 mm by 70 mm. More importantly, it can store a lot more energy. According to Elon Musk, it\u2019s \u201cthe highest energy density cell in the world, and also the cheapest.\u201d\u00a0The 2170 cell is around 50% larger by volume than the 18650, but it can deliver almost double the current (the 18650 delivers 3,000 mA, and the 2170 has been tested at 5,750-6,000 mA).<\/p>\n\n\n\n