Of course, one of the problems with lead acid is their weight but still, any advance is probably good.
New battery to improve hybrid cars
AUSTRALIAN researchers have found a way to produce cheaper and more powerful batteries to run hybrid-electric cars.
CSIRO researchers in Melbourne have developed a new type of lead-acid battery to replace nickel-metal hydride (NiMH) batteries used by environmentally friendly hybrid cars such as the Toyota Prius.
Lead-acid batteries are cheap and can store large amounts of energy.
But if they are repeatedly and rapidly charged and discharged – as happens when used in a hybrid car – the battery plate becomes coated with chemical deposits, meaning the batteries wear out faster than NiMH batteries.
But the UltraBattery, developed by Dr Lan Trieu Lam and his CSIRO team, combines a lead-acid battery with a supercapacitor.
The combination stores as much energy as a standard lead-acid battery, but without the messy deposits on the plate.
“By acting as a buffer during charging and discharging, the capacitor boosts the battery’s life to match that of NiMH batteries,” Dr Lam said.
During lab tests, the UltraBattery lasted four times as long as the best lead-acid batteries, while producing 50 per cent more power.
A test vehicle running until the UltraBattery fails has so far covered 185,000km, while being recharged as needed.
The cost of the battery is also expected to be a third to a quarter of NiMH batteries and a sixth of the lithium-ion batteries used in some high-performance electric cars.
Independent testing has yet to be carried out.
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