Heard it all before, millions wasted on new battery technology projects that don't come to anything. The safest Lithium cell is LiFePO4 which doesn't ignite if punctured. This is what BYD are using in their cars.
No they're not. LiFePO4 is a great mix, but a lousy EV battery. It's very slow to charge, slow to discharge and doesn't hold as much as other chemistries. It's absolutely fantastic as a battery backup but not as good for something that is constantly charging/discharging.
If BYD uses that type of battery why do they keep catching on fire.
I assume it's the BMS they use to manage the cells, those are notorious for catching fire. I have been using LiFePO4 cells in my powerchair since late 2014 with no BMS and a Powerlab 8 charger which charges and balances the cells.
The key factor is the pyrolysis temperature and for lifepo4 this is over 1100C and far in excess of that achieving a home fire. Nimc is lower and more fires have been reported with this technology.
They keep on about how "green" their EVs are, that's great if you don't want to travel far.
I know there's a cheap 7p tariff for EV owners at night, but they are deluded if they think most of their power comes from solar charging.
As for claiming anything, again, I trust the data. Like this April morning: 3°C outside, 7am, 20°C inside thanks to 2-1 heatpump and still the PV panels are producing about as much electricity as we’re using. Even on a foggy or rainy day, they still produce as much power as the house takes on standby (about 300W).
And although the PV panels produce less in winter, obviously, we use more of it, as a percentage. We don’t have home storage, so give about 1MWh away a year of the 4MWh. That used to be closer to 2MWh, but the EVs help soak a MWh of that up. And a newer charger would help use all of it. (A dumb 5 year old unit).
It’s a model that works, in many places, even the Orkneys. In sunnier climbs, so well that some new developments are going off-grid. In the right places it’s cheaper and more reliable than connecting to a grid.
As for claiming anything, again, I trust the data. Like this April morning: 3°C outside, 7am, 20°C inside thanks to 2-1 heatpump and still the PV panels are producing about as much electricity as we’re using. Even on a foggy or rainy day, they still produce as much power as the house takes on standby (about 300W).
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