DNA 200 Watt

[Mooch]

I'm not sure that adapting the DNA200 for 1 or 2 cell operation would be easy. The bq76925 battery management chip they use is for 3-6 cells only. You don't need it, of course, for single-cell operation but 2-cells in series could not be balanced.

And they would need to make sure that the chip was fully disabled for 1 or 2 cell operation. Many chips do not like having a voltage applied to them below their minimum working voltage and zero volts. Operation in this voltage range can result in partial functioning of certain parts of the chip, leading to who knows what.

 

[Mad Scientist]

I just figured out how to make some money. Anyone who wants to go partners, let me know. We will manufacture a 2,500+ mah 3S pack that is about half the size but twice the weight of all existing comparable lipo packs.

We will wire 3 high drain 18650s into a pack with output and balance connectors and shrink wrap it to look just like a lipo pack. We will use colorful shrink wrap with large nano-mega-macro-magic tech lettering on it so lots of people will buy it. They will be happy with the battery life on their dna 200 mods. Plus, with the connectors, they can buy more than one to swap and charge it on any ordinary balance charger while they vape with another one. We will sell thousands of these magic battery packs that are about HALF the size of any comparable lipo available.

Who is "in"? lol

(Edit -- and I actually plan to make a few packs this way, not to sell but to use)

 

[Mooch]

I'm in!
But only if we rate it at 1,000A (20A continuous)

 

[retird]

Why wouldn't it work?

Simple answer is the minimum voltage required is 9 volts... (see data sheet)....

 

[Mad Scientist]

I'm in!
But only if we rate it at 1,000A (20A continuous)

I actually did laugh out loud a bit lol.

 

[VapingBad]

This is from the FAQ on the Evolve DNA200 forum:

Q: Will we be able to set this to 4.1 V to increase battery life time?
A: It isn't in the software right now, but this isn't a bad idea. I'll see if we can put it on the to do list.

The way it could be Implemented is my own idea but it's the only logical way to do it.

That was my question about charging to extend battery life, it is in and it is 4.1 V per cell not 4.1 V total, there are no 4.1 V batteries sorry. This is where I asked the question Can the max charge V be set? - DNA 200 Early Adopters Forum, they could have done the ref better in the FAQ.

 

[yo han]

Why wouldn't it work?

Just asked John from Evolve.
The main reason would be the charging.
Although I think this could be programmed as well.

 

[HolmanGT]

Simple answer is the minimum voltage required is 9 volts... (see data sheet)....

OK - but it still would have been a nice option.

 

[yo han]

Simple answer is the minimum voltage required is 9 volts... (see data sheet)....

That's because anything lower than that is considered an empty battery so when it detects lower than that it doesn't turn on. It doesn't mean it actually needs 9V for the electronics to work. John said they could actually make it work with 2S LiPo as well and that's only just over 6V when almost empty.

 

[HolmanGT]

Just asked John from Evolve.
The main reason would be the charging.
Although I think this could be programmed as well.

Yo Han,

I might just do that. I have kind of stayed away from that forum for now. I can't stand following a piece of equipment that I don't have - YET.

 

[retird]

That's because anything lower than that is considered an empty battery so when it detects lower than that it doesn't turn on. It doesn't mean it actually needs 9V for the electronics to work. John said they could actually make it work with 2S LiPo as well and that's only just over 6V when almost empty.

He did post this after the question was asked: View Single Post - Single cell support by voltage supply detection - DNA 200 Early Adopters Forum

"Not really, no. The whole board is built around using a 3s lithium. I mean, sure, we could detect it, but we couldn't... do... anything with it, couldn't charge, etc.

We COULD conceivably run from 2s in a degraded (probably 120W or so) fashion, but once you go to 2s and taps, there's very little extra cost or difficulty to go to 3. "

 

[DonnyX]

Dear Donny
HANA MODZ V200 The new DNA 200 watt with temperature protection. Limited quantity of the Pre-Production model will be available to order tomorrow July 24th at 10am cst on our website: www.hanamodz.com

Sent from my iPhone using Tapatalk

 

[DonnyX]

HANA MODZ V200
DNA 200 watt temperature protected board
.1 incremental wattage adjustment
Preheat functionality
Dimensions: 4.25" x 1.58" x2.18"
510 floating connector
2850 mah Lithium Polymer battery
1 Amp micro-USB
on-board charging
(cord included)
Overcharge protection
(stops when fully charged)
Pass-thru charging functionality
4-Month Manufacturer's Warranty
Made in the USA
Owners MUST register their Devices w/ Escribe
before using this product


Sent from my iPhone using Tapatalk

 

[Mooch]

That's because anything lower than that is considered an empty battery so when it detects lower than that it doesn't turn on. It doesn't mean it actually needs 9V for the electronics to work. John said they could actually make it work with 2S LiPo as well and that's only just over 6V when almost empty.

Cool, it will be interesting to see how they do this.
The BMS chip can go down to 4.2V but not sure what they'll need to do with the balancing connections. I've never used that chip below 4S.

 

[yo han]

He did post this after the question was asked: View Single Post - Single cell support by voltage supply detection - DNA 200 Early Adopters Forum
"Not really, no. The whole board is built around using a 3s lithium. I mean, sure, we could detect it, but we couldn't... do... anything with it, couldn't charge, etc.
We COULD conceivably run from 2s in a degraded (probably 120W or so) fashion, but once you go to 2s and taps, there's very little extra cost or difficulty to go to 3. "

Yes I've read it. But I also asked what the "etc" would be.
So he says the reason it doesn't support 2S is that it didn't cost much extra to go to 3S. Kinda weird if you ask me. A 2S battery is 33% smaller so much more options for mod makers. Instead they went for a power beast to be able to advertise high numbers. They COULD have come up with a 1, 2 and 3-cell multi purpose board instead, offering loads of flexibility. Which one would you choose?

 

[Mooch]

Yes I've read it. But I also asked what the "etc" would be.
So he says the reason it doesn't support 2S is that it didn't cost much extra to go to 3S. Kinda weird if you ask me. A 2S battery is 33% smaller so much more options for mod makers. Instead they went for a power beast to be able to advertise high numbers. They COULD have come up with a 1, 2 and 3-cell multi purpose board instead, offering loads of flexibility. Which one would you choose?

It's a lot harder to design a power converter that can handle 3V-12.6V as the input versus one that can handle 9V-12.6V. They would also have go make it a buck-boost converter instead of a simple buck converter. This decreases the efficiency and increases the heat they have to deal with. More components are needed for buck-boost too, increasing cost and board size.

And for 1S operation, and maybe 2S also, there would have to be wattage limits as the current draw at 3V for 200W is a bit high. You can always parallel up cells but the circuit board traces and components would be huge. And if you need a 1S3P pack to hit 200W you might as well switch over to 3S1P and enjoy all the advantages.

 

[yo han]

The BMS chip can go down to 4.2V but not sure what they'll need to do with the balancing connections. I've never used that chip below 4S.

Ah, interesting! So that chip is the reason it'll never support single cell?
The balancing plug is indeed a mechanical caveat. You'd need a small adapter cable to connect the 2S balancing plug to the 3S connector.

 

[Mooch]

Ah, interesting! So that chip is the reason it'll never support single cell?
The balancing plug is indeed a mechanical caveat. You'd need a small adapter cable to connect the 2S balancing plug to the 3S connector.

The chip itself isn't set up to deal with less than a 3S pack too. There might be workarounds though.

 

[yo han]

It's a lot harder to design a power converter that can handle 3V-12.6V as the input versus one that can handle 9V-12.6V. They would also have go make it a buck-boost converter instead of a simple buck converter. This decreases the efficiency and increases the heat they have to deal with. More components are needed for buck-boost too, increasing cost and board size.

And for 1S operation, and maybe 2S also, there would have to be wattage limits as the current draw at 3V for 200W is a bit high. You can always parallel up cells but the circuit board traces and components would be huge. And if you need a 1S3P pack to hit 200W you might as well switch over to 3S1P and enjoy all the advantages.

Thanks for the insight.
Yes, maximum wattage would of course have to be automatically lowered when using lower input voltage. But I think most people aren't waiting for 200W anyway atm.

 

[retird]

They COULD have come up with a 1, 2 and 3-cell multi purpose board instead, offering loads of flexibility. Which one would you choose?

Agree... they could come up with any number of things....the DNA200 is what it is.... I think very flexible, adjustable, and with many user defined choices. I currently am happy with 380F@ 25 watts with preheat set to 50 watts. I don't need 200 watts but future coil wire and builds just might require high watt preheat and low current after preheat to maintain temp? Who knows?

I think we all have a "wish list" for that perfect device. I guess mine would be an automatic adjusting temperature controlled device with pre-programmed e-liquid specifications that tailor the vape to the correct temperature to get the best flavor out of the specified e-liquid. If only the e-liquid makers could say what temperature is best for their juice to get the best flavor/vapor.