Powerwall from lithium polymer?

I keep reading online they're super dangerous and cause fires.
But then all batteries could cause a fire.

Do they have to be specially charged or can I use my 4056 chargers?
 
FireFrog said:
I keep reading online they're super dangerous and cause fires.
But then all batteries could cause a fire.

Do they have to be specially charged or can I use my 4056 chargers?

I don't have any personal experience so I can't really comment on that, but yeah, any battery mishandled and mischarged is going to cause a fire. Gasoline is extremely dangerous too, but you pour it in your car every day and it works just fine. You're using it correctly as intended ;)
 
Alright it's settled I'm going to attempt a small pack of the polymer cells and test it to a roughly equivalent 18650 pack to see if its worth it

I'll post finds in a couple weeks, just have to get my hands on some first
 
I have no doubt its worth it froggy. I even opened a laptop pack that had 3x flat packs with nice lil' stainless containers for each.
One major issue with the flat packs is the various sizes. It very hard to develop a bus architecture when ur pack tabs keep changing on ya ;)
I used a $3 boost converter and a 10W LED too create a very nice and compact flood light outta mine. The higher wattage LEDs need 32-35v. It puts out bout as much as a 150w incandescant bulb, All in a <8 ounce pkg that you can carry around with ya:)

Keep pushing the envelope friend, no matter what that DIY Tesla critic says!
~cheers
 
Unfortunately my area has no places to get batteries for me anymore
All shops tell me no
All scrap yards here don't deal in batteries, well except for one place I haven't checked but other than that I'm out of options ?
 
Aspendell said:
I have no doubt its worth it froggy. I even opened a laptop pack that had 3x flat packs with nice lil' stainless containers for each.
One major issue with the flat packs is the various sizes. It very hard to develop a bus architecture when ur pack tabs keep changing on ya ;)
I used a $3 boost converter and a 10W LED too create a very nice and compact flood light outta mine. The higher wattage LEDs need 32-35v. It puts out bout as much as a 150w incandescant bulb, All in a <8 ounce pkg that you can carry around with ya:)

Keep pushing the envelope friend, no matter what that DIY Tesla critic says!
~cheers

Oh and please...
Let us know how it goes. Im very interested in any advice you can offer.
 
I have an old e bike battery...
But I was talking to a friend of mine and he said it's probably going to be easy to stack them and have a lot of energy in a small size.

Perhaps a box with the polymer cells stacked in some series/parallel fashion though more reacsearch is required on my end
 
FireFrog said:
Unfortunately my area has no places to get batteries for me anymore
All shops tell me no

That just means you haven't tried enough places yet.

Trust me, there is always SOMEONE, SOMEWHERE willing to sell you laptop batteries (you have offered to pay for them right?). you just haven't celled enough places. Also, there are other places you haven't considered like:

Scrap yards
Computer recycling centers
Lowes
Home Depot
BAtteries plus
Computer repair stores
Radioshack
Craigslist
Freecycle
Security offices
Large officebusinesses

Ask around, ask everywhere you can and anywhere you can get them from. You need to get the word out.

First, try being nice. Call up the shop and offer to pay for it. If they refuse add their name to a spreadsheet and call up the next shop. Keep doing this until you run out of places to call.

For you next job, it's time to stop being nice...

If a shop tells you they won't sell to you. Ask them why. Because if they won't sell them to you, you have absolutely nothing to lose. Keep poking, prodding, and generally annoying them until they either tell you who they send their laptop batteries to (so you can then go to them and try to buy them) or until they ask you to leave.

Because most of the places I go to I would never go there to buy anything for any other reason, so my attitude is I might as well have a "no more mister nice guy" and come off sounding that I WILL get my hands on these batteries from either you or somebody else whether you like it or not. If they won't sell to you, it's time to get nosy and pushy, just like a salesman trying to meet a quota...

By using this method, I talked my way into getting two very large recycling centers who now sell me laptop batteries for $1.5 a pound. The only downside is I have been banished from a small computer repair store and asked never to come back. But again, I really don't care. I was never going to go to that computer repair store for any other reason other than to collect laptop batteries anyway, so to me it isn't a loss.

Also here is something else you could do...

Go onto google and leave a bad review on their business stating they are an awful company that won't sell you things. Then rant about them on social media, facebook twitter. Make sure to get the word out that they are a terrible company and nobody should do business withthem ever.

This is how I get three other computer repair shops to work with me. I left a bad review on google about them and tweeted about them on twitter and they bended to me. I now have found another source of laptop batteries who sell them to me for $1 a pound.

The most important part here is to make it VERY ABUNDANTLY CLEAR that you WILL get ahold of laptop batteries from them whether they like it or not. And if they refuse to sell them to you, tarnish their reputation as a business and they will be forced to bend to you.

Just a reminder. Your entire goal in building a powerwall is to get ahold of as many cells as possible. Only be nice to the guys who are supplying you with cells as you may be able to get better deals later on. But the guys who you have celled up that refuse to sell to you, turn into a pushy salesman to get your way.
 
LiPo is more fragile since they are not shielded in same way as 18650 are. Thats how i think about it.

As long as they are taken care of properly and you dont abuse them in sense of current or voltage they should be fine.


But worth noting is that there is tons of different chemistry out there. Thats what you should look at i think :)


But as always. If you can: Keep the packs in a shed a bit away. (I dont though.... But i should......)
 
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