How to Dissassemble Dewalt 36V battery

[nicktumi]

What bit are you using to open the battery housing?

[73amxman]

does anyone repair these batteries I have 5 that have died. I would like to get them fixed instead of having to replace them at 125 bucks a piece.

[derman077]

i need like three of those in parallel for my electric scooter.

[nicktumi]

@derman077 How are you going to charge that system? I am new to battery charging and I want to build an electric bike or car using A123 batteries. But how to charge a system on that scale, well I'm clueless on where to begin.

[EBIKE100]

Yes.....nice and quiet in this video!!!

[XCritonX]

What other parts besides the batteries are valuable in the pack? Anything else we can recycle? What is the type designation of the individual batteries?

[Doctorbass]

all the plastic covers can be recycled ( PVC) and the label on the cell is A123 26650 and are known as M1 cell or LiFePO4 cell chemistry

[gtarbmx]

much more complicated than the 18 volt

[ez3usx2]

have you seen the 59 lincoln neil young is converting to electric?instead of plugging that car in to recharge u plug it in to power r house.

lincvolt check it out on youtube.

[devja71]

great vids doc. i have a wilderness 36v 20in front wheel on a foldup bike i carry in the semi with me. the 9ah lead acid packs are a pain, heavy, and almost wore out. i've thought of hooking 2 of those 18v's together but i haven't got that far yet, and i'm not too bright either. but i have many energizer 'd' nimh rechargables, anyone make a case to install 24 d's in? and would they produce much range? thanks doc and good luck

[raypsi]

Hey Devja71:

sure 10 AH D's would do the job but, at 500 charges they fall short in life compared to 2000 charges. And you better have a excellent smart charger for them to make em last 500 charges.

[ChrysKane]

@raypsi Anyone knows how many AmpHs these batteries are?

Chrys

[raypsi]

@ChrysKane Like 2AH.

[khanhvien]

It's the best bettery I've never seen before!

[barabranch]

ebay dewalts are much higher now cause of ebikes

[nicktumi]

so how could i use these to put into an electric car or bike. im planing on building one. but have to do it the cheapest way possible. so i found the a123 3.3v for $20 each from a website. would it be cheaper to buy dewalt pack. whats the thing you take off first. i dont know how these batteries are supposed to be charged i just need a cheap way of makeing a very good running electric bike or car. thanks

[redSKORPION50]

Was there a really good reason to be gutting a battery pack? Im just wondering why youd be bothered.

[Doctorbass]

additional spec:

Max power out of the cell (10 sec) 345Watt

Min charge time 15min

This battery is excellent and almost used in the RC community and electric vehicule.

Doc

[raypsi]

Hey Doc: 345watts max power from 1 cell is a tad bit high. Max power is limited by the 10milli ohm internal resistance. If a person were to draw say 140 amps, the voltage drop across that resistance is 1.4 volts. You take 3.3volts minus 1.4 volts is 1.9 volts output, taking it to the bottom line: 1.9 volts times 140 amps is 266 watts.

[Doctorbass]

Great calculation you did .. but in fact the 10 miliohm is not constant.. sometimes after few hour of fresh charge, at around 90% DOD, it decrease a bit... I've really measured 1600W out of 4 in serie in my boostpack video.. that's 400W each.. the V drop is not so important.. at 160A i got 2.5V each cells.. 2sec burst.. just enough to start a car

[raypsi]

Holy mother of jesus that's negative temperature coeffecient for the internal resistance that's like getting energy for free, 'cause you are down to almost 2 milli ohms of internal resistance at 160 amps. lucky they are explosion proof. That's alot of freaking joules.

[Doctorbass]

2sec 400W 800joules!

for sure that will negatively affect the cell life cycle but these cells are rated 2000cycles.. so i dont bother with that !

Doc

[kissmyhho]

your a clever dood.thanks for the calcs and info. i always wondered how discharge works etc.any links for interesting info on this would be appreciated. regards andy

[drdhdmd]

Is there supposed to be sound on this video?

What are the specs of those cells?

[Doctorbass]

Effectively, there is no sound on it. My Lumix picture camera doesn't have... The spec of each cells are: 3.3V nominal 2.3Ah internal resistor 10 miliohm Charge to 3.6V cc-cv Max charge current 10A Max discharge current (10sec) 140A Max continuous discharge current 70A Min discharge voltage 2.0V recommended 2.5V Size 25mm dia 65mm long (25650 model) Manufactur: A123 system Chemistry: Lithium ironphosphate (LiFePo4)

[zazu107]

thanks for this video db

nice work. If I could only find returned batteries here in toronto. I guess they are not breaking down here as much and thee is only one aUTHORIZED INDEPENDENT DEALER.

how about homedepot or rona I wonder!

thanks for this. efreak