Panasonic is betting that near a century of expertise making automotive batteries has ready it to fabricate a difficult-to-produce next-generation battery championed by Tesla as the important thing to unlocking cheaper and extra ubiquitous electrical automobiles.
Elon Musk, Tesla’s chief govt, first unveiled the 4680 battery at Tesla’s Battery Day in September as a “large breakthrough” in cell know-how that can make it potential for his firm to provide electrical automobiles that promote for €21,000, roughly a 3rd lower than Tesla’s most simple Mannequin 3.
Whereas Tesla plans to make the cells in-house, it has additionally requested its oldest battery provider, Panasonic, to start producing them as nicely.
The catch: the thicker and extra voluminous 4680 cells, named after their dimensions of a 46mm diameter and 80mm peak, are nonetheless largely unproven.
Business consultants even query whether or not the batteries, which resemble a downsized model of the aluminium cans used for sodas and beer, are potential to mass produce.
“There are vital technological points to get previous, points that many within the trade have been making an attempt to deal with for years,” stated Ram Chandrasekaran, a transportation and mobility analyst at Wooden Mackenzie.
“If achievable, these battery cells could be groundbreaking. However the jury’s nonetheless out on whether or not they’re deliverable,” he stated.
Panasonic says it could be finest positioned to see the difficult new cells to market.
Proper now, the Japanese electronics maker is working to arrange a prototype manufacturing line for checks.
“Producing these bigger cells requires you elevate your craftsmanship one or two full ranges or there will likely be questions of safety,” Yasuaki Takamoto, Panasonic’s EV battery head, stated in an interview.
A lot of the advantage of the brand new 4680 cells comes from the truth that they’re greater than 5 occasions the scale of the smaller 1865 and 2170 cells Panasonic presently provides to Tesla.
Because of this the standard 4,000 to eight,000 cells present in an electrical automobile as we speak might be lowered to about 500, which, in flip, means fewer elements corresponding to bonding items used to string particular person cells collectively.
New cell shapes such because the 4680 are “key to creating extra reasonably priced EV fashions which can be able to meaningfully spreading,” stated Akira Nagasaki, technical technique head of Mr Takamoto’s staff.
The bigger capability, nonetheless, can be what makes the cells harder to provide.
They’re liable to overheating as a result of it’s troublesome to disperse warmth from their centre. They’re additionally extra vulnerable to particle contamination, a frequent trigger of electrical automobile battery fires that happens when minuscule steel items discover their approach into the centre of a cell.