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Post by Batdragon (AKA Batty) on Jul 11, 2012 2:39:56 GMT
Has anyone used a Powermat for chargin up the batteries on their PV's? If you do not know what a Powermat is look here Powermat |
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Post by domesticextremist on Jul 11, 2012 4:42:59 GMT
I think hifistud tried this a while back - with limited success.
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Post by Batdragon (AKA Batty) on Jul 11, 2012 5:42:42 GMT
Oh cos I've just got one & was trying it out last ngt with my pass through & it did charge it up as I was using it. It just made me think that I'd seen something like this with a PV.
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Post by domesticextremist on Jul 11, 2012 5:48:39 GMT
There is an ego style thingy with an inductive charging base too.
Forgot the name, maybe hifi will be along later to enlighten us.
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Post by Perpetua on Jul 11, 2012 6:21:37 GMT
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Post by Batdragon (AKA Batty) on Jul 11, 2012 6:27:41 GMT
Yer that was the thingy I saw being used. I was thinking more on the lines for box mods cos got to say,it's rather cool for charging my phone & passthrough  |
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hifistud
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Post by hifistud on Jul 11, 2012 9:57:42 GMT
We're actively looking at a self-build mod that will charge on the power mat with no external boxes - once we've got it sorted, expect some video!
But Perp's link is correct - and Gill, my wife, is ore than happy with hers - it's all she uses these days.
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Post by Batdragon (AKA Batty) on Jul 11, 2012 10:09:32 GMT
I managed to pick up the Rx part for £4.30 ea delivered from play.com . I also got the portable 3 section mat from them for under £9 delivered also. I have ordered a few more receivers so I can play about with one by taking it apart & putting the guts into a funky mod for myself that uses a phone battery. It basically will make it a wireless passthrough.
Is that your intention too or are you going for the cylinder version of it?
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hifistud
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Post by hifistud on Jul 11, 2012 10:41:13 GMT
At the moment, MGJones and I have the 2x18650 battery boxes with room for electronics up top - the biggest hurdle is the charging circuit to take the 5v from the receiver coil and deliver it to the batteries to be sure that there's as little risk as possible of the whole thing going postal on the charging mat. The Powermat's construction is such that each coil is a specific size and it's pretty much too big to fit a receiver coil to a cylinder - the coils are around an inch and a half in diameter, and that's pretty hefty, but a dual 18650 box can handle it nicely.
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Post by Batdragon (AKA Batty) on Jul 11, 2012 11:42:23 GMT
I take it that the batteries are in series then being a dual 18650 box. My thoughts on this when I was going through the brain storming part of it was to use a buck boost circuit to up the voltage to around 12v. Then feed that into a dual pack charger circuit for rc kit. Which pumps out the 8.4v for charging. The reason I scrapped it was two fold. First was battery stacking & the associated fears of that (had not read up in it much then though) secondly due to the amount of space this config would take up if not a combined design. So I left it in the book of ideas & have gone for single battery mods. I might go back to that idea at a later date when I have time to redesign my own circuits & possibly my own ic. |
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hifistud
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Post by hifistud on Jul 11, 2012 13:01:56 GMT
Nope - they're in parallel, even if we do decide to use cylindricals - we'll be using the Evolv DNA as the power controller, so it's 3.7 and definitely not stacked. The other option is a flat pack li-polymer battery - the issue is sourcing the right dimension and capacity.
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Post by Batdragon (AKA Batty) on Jul 11, 2012 13:50:22 GMT
If your going for the parallel battery what's your take on balancing the charge on them? I have looked around for lipo batteries that could be manufactured into particular shaped spaces but the cost put me off that idea (that was not for a vape mod though). Have you looked through the rc world of batteries, though guessing you have lol. I did find one at a reasonable size & price called the "Intellect 3.7V 5000mAh 40C LIPO Race Pack" but by the sounds of it your looking for something in the +1Ah range. I do like the look of the DNA 12 & It's not that expensive. There are quite a few lipo charging chips out there it would be the issue of finding one to match the quality of the rest of your product. |
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