Ev homemade battery
 

Dia duit
I have been researching ev batteries and was thinking of building my own zinc prototype heavy duty Chrolide battery with active recycling has anybody built this prototype that gulf and western built in the 1970 80 years
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Dia duit
I have finished the zinc air battery decided to go with that as we have one of the biggest zinc mines in the world here in ireland got 1.5 volts going to see if I can post a picture of battery not great with fancy phones I want to get to around 177 volts with good amp hrs I have a old DC welders with a few modifications done for recharging the pack in 42 minutes from flat

I don't know much about zink batteries. What kind of watt-hour per KG are we talking about? How deep can they be cycled? how many cycles will they put out? What level of peukert effect do they have, if any?

Then...how will you manage to mass produce them to all be equal to one another, so they stay balanced? Or is that even an issue with this chemistry?

Zinc air batteries don't recharge.

Well...that's rather pointless! :p

Dia duit oil pan 4
I have managed to get my zinc air battery to recharge I think it is a problem if you let the tree like structures form between cathode and anodes I used a sponge like material and put in a jet to inject a small amount of dry nitrogen this seems to stop it forming when recharging I will put up some photogragh of final set up I want to get at least 270 miles between charging I plan to fit 23 HP diesel hooked up to DC generator to keep pack above minium discharge we have fast DC chargers for free in Ireland so hopefully never have to start engine

How many times will it recharge?

WTF ?????

I think I missed something here

Dia duit oil pan 4
I think I should take time to explain my battery design and reason for trying to manufacture a homebuilt battery research says zinc is a widely abundant metal now compare that to lithium it is nearly all comes from China mines and is very expensive when deciding on my build I looked at my home island of Ireland and worked out there was plenty of zinc so future volume production could be sourced here instead of importing expensive batteries materials from overseas I think there are plenty of zinc mines in Amerikay also now my build is a prototype I have drained it 101 times so far running a set of bulbs to drain power it is a 8 cell unit 12volt 8 cells at 1.5 volts linked in a series it's rough but it works I know there would be far more people converting to EVs if the battery was less expensive there is some great motor controller designs and set ups on here but no homebuilt batteries I can t afford fancy lithium batteries I have got some I have dismantled and to tell you the truth they is not much to them it's the metal that is expensive and hard to get I plan to increase prototype to 288volts 24 12 volts cells linked to gather and wired that each 12 volt cell gets charged separately so if one fails then it will still give power any help or photos of factory built batteries would be greatly appreciated
Go raibh maith agat

Any chance you could use some punctuation!

Many Thanks

Dia duit cr45
I am sorry about that I am more used to the pen than the keyboard
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What do these batteries look like?
How much power do you get out of them.

Yes the lithium fan boys always talk about how common lithium is in the earth's crust but fail to explain if it's so common then why is the battery ore always sourced from Africa or china?

Bah, punctuation is overrated! ;)


I'd rather not be called a lithium "fanboy", but it certainly has it's advantages, energy density being at the forefront. And in second place is it's ability to be recharged thousands of times instead of hundreds.

NiFe batteries can be recharged tens of thousands of times, which is awesome...but they have a worse energy density(wh/kg) than even lead acid, which make them pretty damned useless for anything but stationary power supplies.

I see here that they have a high energy density, which is great. Recharging is "inconvenient". Doesn't say anything about how many times you can, which would be important to me in such a project. My other concern would be the "high internal resistance", which will be murder on either your ability to pull high amps out of them, or else will result in needing a very large battery to overcome.

Thus I'll be interested in your methods to overcome the issues and your progress. Would be nice to have a cheaper alternative to lithium.

Off grid needs lots and lots of cycles and low energy density and high weight is fine.
Mobile needs high power to weight ratio.

Dia duit oil pan 4 and stuby79
Thanks for your advice and thoughts on batteries if you get a chance you can check out what a company called gulf and western did with zinc batteries in late 1970 s and early eighties.
There is a great advert for there battery system if you look at there research they spent millions of dollars bringing the battery to prototype stage they used a zinc Chrolide solution it had great amp hrs and kept the power going to almost exhaustion point of cells. Then they simply used a refrigeration system to trap the Chroline gas in water to form a slushy ice soultion and so the cycle began again my concern was cost of that build and weight hopefully I can achieve same output half the weight by using air as the electrolyte instead of zinc Chrolide and water I will post the drawing and photogragh when I build the stack if you can help point out any flaws and share you experience and battery data that would be great I will run a load test on the bench
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Jack Rickard Videos

The current episode is EVTV Friday Show - January 13, 2017. Using Tesla Battery Modules. At 28:30—31:59 he discusses battery safety vs energy density.

See also: https://www.google.com/search?q=inurl%3Aevtv.me+zinc-air

Technology and Products – Eos Energy Storage
http://www.eosenergystorage.com/wp-c...ules-white.png

Dia duit freebeard
Thanks for posting pictures of the EOS system they differ from my design maybe they are more focused on ulitility load what I want to try is a stack with weight and density I will be testing this week hopefully have results by Friday and then try fitting it to truck for road testing I liked the evtv link
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If you take some time to watch the most interesting episodes (to you), you'll find that there are a lot of issues you'll need to characterize.

• top/bottom balancing?
• battery box heating/cooling needed?
• overcharge/undercharge cause FIRE OR EXPLOSIONS?
• Nordlock washers on the electrical connections?

He's a slow talker, try 125% or 150% speed. Their rule of thumb is that when the battery boxes are complete and populated the job is 80% done.

IIRC they have a contributor in Ireland. I believe he is doing a BMW 5-series conversion.

Dia duit freebeard
Still testing battery some great results why is zinc not being used for EVs testing my zinc battery against lithium polymer I find lithium needs constant recharging every third day is that normal for lithium batteries do they self discharge hope to get a 300volt pack built waiting on more zinc not sure how to post a picture of protype 12 volt pack?Could you advise
Ran a 12 volt tractor starter for nearly ten minutes yesterday on bench not in tractor this is good surely
Go raibh maith agat

You can attach files - your photo in this case - in the "advanced" reply button, using the "paperclip" button at the top. Maximum 195kb in size, though, so you will probably need to resize them first.

Otherwise you can upload them to a photo hosting site (like photobucket) and just use the "direct link" and paste it in using the "insert image" button at the top of the reply box.

Edit: I take it that tractor starter motor wasn't series-wound, otherwise it would have spun itself to death.

All I know about batteries is if you take US pennies, file one face off, and stack them interleaved with paper soaked in vinegar you get a battery. ...Or so I've heard, I wouldn't do that as it is defacing government property. I do wonder if it would be cheaper than buying AA cells.

I like to think that you will be posting a lot of pictures. Click on your name on any post; or below Welcome Mrmacireland in the upper-right of the current page, that will take you to your profile. Click on Pictures and Albums on the left and create at least one album. Start with some organization in mind, else they turn into an ad-hoc labyrinth — at least mine did. I'd love to congregate trailer pictures into a new album, but it's too late.

Any progress?

Do you mind sharing more information about your batteries? How you build them etc?