Author Topic: Withdrawn  (Read 12809 times)

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Offline sk2593@cornell.edu

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Withdrawn
« on: January 20, 2016, 07:57:11 pm »
Withdrawn
« Last Edit: January 22, 2016, 04:54:19 pm by sk2593@cornell.edu »
 

Online drussell

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Re: Cofounder needed for Battery Charger startup
« Reply #1 on: January 21, 2016, 01:40:25 am »
The startup will manufacture a battery charger which will work with most rechargeable batteries of varying size and shape independent of the battery chemistry.

Oh, really?

And how exactly are you planning on doing that?!

 

Offline John_ITIC

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Re: Cofounder needed for Battery Charger startup
« Reply #2 on: January 21, 2016, 02:03:07 am »
This will be interesting.  :popcorn:

Offline SL4P

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Re: Cofounder needed for Battery Charger startup
« Reply #3 on: January 21, 2016, 02:14:08 am »
Well at least it's not crowd funded
Oops - yes it is
Call Bob, he's looking for his next IGG project.
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Offline Towger

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Re: Cofounder needed for Battery Charger startup
« Reply #4 on: January 21, 2016, 02:18:21 am »
Must be a windup.
 

Online Mechatrommer

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Re: Cofounder needed for Battery Charger startup
« Reply #5 on: January 21, 2016, 03:30:48 am »
Battery Charger...
Cornell University...
The powerbank battery has a capacity of 1500 mAh and can juice up in about 5 mins!!!
oh no, not again :palm:
It's extremely difficult to start life.. one features of nature.. physical laws are mathematical theory of great beauty... You may wonder Why? our knowledge shows that nature is so constructed. We simply have to accept it. One could describe the situation by saying that... (Paul Dirac)
 

Offline blueskull

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Re: Cofounder needed for Battery Charger startup
« Reply #6 on: January 21, 2016, 03:50:02 am »
1. One engineer and 2 MBA?
2. 5C discharging is fine, even 30C makes sense. 5C charging is probably not.
3. Arduino in commercial closed source product = GPL violation. Open source charger = being copied quickly.
 

Offline MrSlack

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Re: Cofounder needed for Battery Charger startup
« Reply #7 on: January 21, 2016, 07:18:52 am »
Engineer to MBA ratio FAIL. If there's anything I've ever seen as concrete is that engineering driven startups are the most likely to succeed and MBA driven are most likely to fail.

How many MBAs does it take to change a light bulb? None, they come up with the most contrived way of doing it, get VC funding for their new turn-a-matic light bulb extractor on a stick, hire a series of engineers who laugh their way to the bank, end up blowing the entire budget on apologising on kickstarter for spending the entire VC capital on Herman Miller chairs and cocaine and finally end up sleeping on someone's sofa because they bankrupted themselves.

If you want evidence of this, go and see how many batches of Herman Miller Aeron chairs are on eBay :)
« Last Edit: January 21, 2016, 07:20:42 am by MrSlack »
 

Offline rx8pilot

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Re: Cofounder needed for Battery Charger startup
« Reply #8 on: January 21, 2016, 07:41:31 am »
Experienced engineer...... No pay........ Startup........ Arduino.......revolutionize.



Sent from mobile device.... Keeping it short and mis-spelled

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Offline station240

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Re: Cofounder needed for Battery Charger startup
« Reply #9 on: January 21, 2016, 09:14:50 am »
•   You are an experienced electronics engineer who is familiar with power supply, DC to DC converter, Op Amps, familiar with integrated chips like LM2904 and LM317.

You're planning to use a LM317 linear regulator from The Ark in a high current battery charger ?
Should be interesting to see the heat/smoke output from that.
 

Offline SL4P

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Re: Cofounder needed for Battery Charger startup
« Reply #10 on: January 21, 2016, 09:18:19 am »
•   You are an experienced electronics engineer who is familiar with power supply, DC to DC converter, Op Amps, familiar with integrated chips like LM2904 and LM317.

You're planning to use a LM317 linear regulator from The Ark in a high current battery charger ?
Should be interesting to see the heat/smoke output from that.
So the MBA has identified the technology and components to be used...
Perhaps they can dispense with the EE, and simply get a PCB designer...?
Don't ask a question if you aren't willing to listen to the answer.
 

Offline EEVblog

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Re: Cofounder needed for Battery Charger startup
« Reply #11 on: January 21, 2016, 10:10:46 am »
The startup will manufacture a battery charger which will work with most rechargeable batteries of varying size and shape independent of the battery chemistry.
Oh, really?
And how exactly are you planning on doing that?!

My thought exactly.
Do you realise that charging touchy exothermic battery technology like LiIon outside the very strict conditions is dangerous? Right?
 

Offline EEVblog

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Re: Cofounder needed for Battery Charger startup
« Reply #12 on: January 21, 2016, 10:18:42 am »
I have already developed a powerbank battery that will use this smart charger. The powerbank battery has a capacity of 1500 mAh and can juice up in about 5 mins!!!

So if this your own battery chemistry?
What exactly is the technology innovation in your "powerbank" battery?

1500mAh in 5 min = 1.5A x 12 = 18A charge rate (12C)

http://batteryuniversity.com/learn/article/ultra_fast_chargers
 

Offline MrSlack

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Re: Cofounder needed for Battery Charger startup
« Reply #13 on: January 21, 2016, 10:38:51 am »
It doubles at an incendiary device of course!
 

Offline Delta

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Re: Cofounder needed for Battery Charger startup
« Reply #14 on: January 21, 2016, 03:22:39 pm »
Hahaha!

Best of luck with this one Sandeep!
 

Offline suicidaleggroll

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Re: Cofounder needed for Battery Charger startup
« Reply #15 on: January 21, 2016, 04:14:09 pm »
5 mins charge @7.5 WH = 90 watts/min.

WTF is a watt/min?
 |O
 

Online wraper

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Re: Cofounder needed for Battery Charger startup
« Reply #16 on: January 21, 2016, 04:24:08 pm »
 

Offline MrSlack

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Re: Cofounder needed for Battery Charger startup
« Reply #17 on: January 21, 2016, 04:26:29 pm »
 

Offline tom66

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Re: Cofounder needed for Battery Charger startup
« Reply #18 on: January 21, 2016, 04:52:06 pm »
WTF is a watt/min?
 |O

Hey, at least it's not kWh per hour.


Average charge rate has to be 90 watts per minute.

90 watts per minute makes no sense. Watt is power, you need to use a unit of energy, like joules, Wh, kWh, kilocalories.

What field is your engineering degree in and from what university? If it's an electronic engineering degree I would be asking for a refund.
« Last Edit: January 21, 2016, 04:55:03 pm by tom66 »
 

Offline suicidaleggroll

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Re: Cofounder needed for Battery Charger startup
« Reply #19 on: January 21, 2016, 06:41:33 pm »
What field is your engineering degree in and from what university? If it's an electronic engineering degree I would be asking for a refund.

He claims to be from Cornell.  I've been to Cornell before, and I know a handful of people in the graduate EE department there, they're not idiots.  If any one of them ever said "watts per minute" in this context, they'd get smacked in the face.  If not by me, then by any of the students or faculty in the room.
« Last Edit: January 21, 2016, 07:02:50 pm by suicidaleggroll »
 

Offline suicidaleggroll

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Re: Cofounder needed for Battery Charger startup
« Reply #20 on: January 21, 2016, 06:43:56 pm »
WTF is a watt/min?
 |O

1/60th of a joule?
1/60th of a joule per second squared.  It's an energy acceleration, and makes no sense in this context.
« Last Edit: January 21, 2016, 07:02:40 pm by suicidaleggroll »
 

Offline coppice

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Re: Cofounder needed for Battery Charger startup
« Reply #21 on: January 21, 2016, 06:49:59 pm »
WTF is a watt/min?
 |O
It would be a rate at which a power level is changing. Not a stupid unit, but not the correct one in the current context.
 

Offline Simon

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Re: Cofounder needed for Battery Charger startup
« Reply #22 on: January 21, 2016, 06:56:34 pm »
 :popcorn:
 

Offline suicidaleggroll

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Re: Cofounder needed for Battery Charger startup
« Reply #23 on: January 21, 2016, 06:57:33 pm »
It would be a rate at which a power level is changing. Not a stupid unit, but not the correct one in the current context.
You're right, it could make sense, but not in this context.  I could chalk it up to a typo, but then he wrote the exact same thing again.  Anybody who does not know that a watt is already an energy rate should not be going anywhere near power system design.
 

Offline SL4P

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Re: Cofounder needed for Battery Charger startup
« Reply #24 on: January 21, 2016, 10:23:51 pm »
ok, I got it...
MBA = master of battery analysis

the charge rate will require battery leads the thickness of your pinky finger +/ -  /sense combined.

Good Luck.
Don't ask a question if you aren't willing to listen to the answer.
 


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