Tesla strikes ahead with making use of enhancements to the low-voltage system of its electrical autos, which thus far was working at roughly 12 volts identical to within the overwhelming majority of different vehicles.
In the course of the current 2023 Investor Day, Tesla’s representatives confirmed the intention to introduce a 48V system, which regardless of a few years, remains to be a uncommon answer within the automotive trade.
Step one for Tesla was the swap from 12V lead-acid auxiliary batteries to 12V lithium-ion auxiliary batteries, introduced in February 2021, and initially launched within the refreshed Tesla Mannequin S/Mannequin X (beginning with the Plaid) – see an in-depth teardown right here – and later used additionally within the Mannequin 3/Mannequin Y (in late 2021).
In keeping with Tesla, the outdated lead-acid batteries had been a serious supply of failures in Tesla vehicles, they usually wanted a substitute about each 4 years or so. The brand new lithium-ion batteries are anticipated to face up to the lifetime of the automotive (identical to the primary traction battery), so there ought to be no substitute wanted in any respect.
That is the plain enchancment, on high of which comes a smaller dimension and decrease weight (87 p.c discount).
Tesla says that beginning with the Cybertruck (this yr), the Optiums robotic, and all future electrical autos, the 48V low-voltage system will likely be used.
For reference, the automotive trade moved from 6V to 12V within the Sixties (presently smaller autos would possibly nonetheless use 6V, whereas bigger autos use 24V).
Tesla will use a 48V system as a result of it can cut back the present by an element of 4, in comparison with 12V techniques. This voltage degree remains to be thought-about protected.
The rise in voltage is a necessity as energy demand for onboard electrical gadgets steadily will increase and at 12V, the wires have gotten thick, heavy, and dear.
With a 48V system, there will likely be noticeable weight and price financial savings, whereas on the similar time, effectivity would possibly enhance.
That is a extremely attention-grabbing change, which will even require a brand new 48V lithium-ion auxiliary battery – within the case of Tesla, it would even be produced in-house (we do not know but).