Monday, February 6, 2012

2012 - All Change!

Well, we're back from our adventures in Japan and while out there, I made an important decision...

I hate lead acid batteries.  They're rubbish for solar applications.

So I took the plunge and put in an order for some batteries I've been eyeing for a few months now.  They get used a lot in the DIY electric car (EV) arena because they are light, powerful, small and can withstand deep discharges daily.  What's more, they are based on lithium ion technology and so do not need or even particularly like being kept at full charge all the time, as lead acid batteries do.

In short, they are much superior to lead acid batteries in many respects (but not all).

Of the makes available, the only one that was available in Europe (let alone the UK) was the Winston Battery Company make.  These are a new sub-type of lithium ion cells that use yttrium (a rare earth metal) to significantly improve the reliability and safety of these cells, compared to the previous generation of cobalt based lithium ion cells.  These could explode violently in a ball of flames (hence the stories in the papers about exploding mobile phones and laptop batteries).
Over the next few days and weeks, I'll be getting to grips with these new cells in order to build them into a 24V nominal 400Ah battery pack for my solar system.

You can find them at the GWL EV Power shop

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