Quote:
Originally Posted by ProDigit
If the Prius is anything like the Tesla, the 12V battery is used to power the electronics in case of a depleted battery pack, as well as use the 12V to start the engine in case it is depleted.
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The Prius only uses the traction battery to start the engine; the 12V powers the computers and accessories. It cannot "start the engine in case [the battery pack] is depleted." That's the trade-off between Toyota Hybrids and the early Honda hybrids--Toyotas have always required a functioning HV battery for the vehicle to move (Hondas do too now, but their earlier IMSA hybrid system did not).
Quote:
Originally Posted by ProDigit
And 2017 and 2018 priuses use a Lithium battery pack, so in that case, Mr Shouty was right!
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Starting with the 2016 model year, all Prius trims use a lithium ion HV battery except the 2, which continues to use a NiMH battery. Priuses equipped with lithium ion batteries comprise less than 10% of all Priuses sold in the US in the last 17 years--but they all use stop-start, lithium ion batteries not required. And no Prius has ever come equipped with a 12V lithium ion battery, the picture Shouty displayed when he said "lithium ion batteries, like in the Priuses."
Shouty also remains wrong about the larger point he was trying to argue: that cars equipped with stop-start systems can't handle repeated stop/start cycles. He asserts that "stop-start works great in hybrid cars because they were designed that way," and seems unaware that non-hybrid cars with stop-start are
also designed to handle the system--the OEMs wouldn't waste project budget to engineer, sell and warranty them otherwise.
Furthermore, if Shouty thinks the biggest danger of constant on-off cycles is trashing crankshaft bearings or other mechanical damage to the engine, the Prius and other hybrids constitute a mountain of evidence
against his assertion. He seems to think that stop-start systems are a brand new thing on the market, when they've been around since the 1980s and are found today on everything from Bentleys to Kias. In the US, Ford has sold cars with them since 2010; Chevrolet since 2012; Honda since 2000; Toyota since 2001. If these systems were causing engine failures left and right,
we'd know it by now.
Shouty is not an engineer. Shouty doesn't like change. Don't be like Shouty.
