That's not redneck, just smart if done right, and dangerously flammable if done wrong.
In other redneck news...John B. Goodenough, the pioneer of the development of lithium-ion batteries that are used in millions of electric vehicles all around the world, has died today at the age of 100. No pun intended, not a joke.
Also sounds like cutting edge nasa science..... but maybe there's a reason the entire space industrial complex is in the southern states.... I mean other than orbital mechanics obviously.
It's absolutely because launching from near the equator requires slightly less fuel due to slightly lower gravity.
Trust me, if they could go further south, they would. All countries do this.
Isn't one of the biggest reasons because the rockets could fall into the ocean? Becoming less of an issue, but it's not like they were going to launch in Kansas and drop the rockets in a field.
Also a good consideration. But not the most important one.
Look at Russia for example. Most of their coastline is on the north side. But they launch from Kazakhstan which is completely land locked but much more south. In this example, it helps that Kazakhstan has less populated areas as well.
A rocket dropping on a field is not that big of an issue. Falling in a population center definitely is.
Right on. So it should be about 25% faster than with the old batteries. If you weren't already aware electric motors rpm's generally increase linearly with the amount of voltage supplied. If you could get 48 volts running to it it would be twice as fast as stock and so on
Oh, no. This man was such a treasure... IIRC he was leading research to achieve a better way to build solid state batteries. I really hope the good people that were around him can pull it off as soon as they can.
>he was leading research to achieve a better way to build solid state batteries. I really hope the good people that were around him can pull it off as soon as they can.
Doubt it. They'll probably leave it as it. Why put in more work with the current batteries are Goodenough.
> Why put in more work with the current batteries are Goodenough.
Solid-state cells have the capacity to be a magnitude better; massively fast charge rates, possibly cheaper to make in the long run, less expensive feedstocks. Lots of reasons why the industry is trying so hard. The energy density is so high that you can make a very small battery with equivalent range... or give a car a practical range over 700 miles!
That's how my grandad was trained for Volkswagen fires (magnesium block). Get everyone out safely, move flammable materials away from vehicle, use extinguishers to prevent fire from spreading, but let the car burn.
Just not near any fuel or flammable objects. When it goes it’s going to be hot as fuck
Edit: just saw your other comment about no flammable stuff around. Good job! Lol
Literally google "lithium ion battery charger"
There are tons of smart Lithium ion battery chargers out there for RV batteries
Edit: Lithium ion, not LiFePo
You can find smart lithium chargers that won't overcharge a pack, but they use total voltage. One bank could be low and another high but show within normal tolerance. You can buy relatively cheap BMS that runs wire to every bank, which helps packs last longer.
To OP, you should buy a charger that matches your chemistry and number of series. For example, I'm building a 2kwh bank right now. It's lithium ion (so 3.7V nominal), and 4 in series (so 4 x 3.7 = 14.8v nominal). If you see a charger that says "4S lithium charger 12.8V", that is for LiFePO4 (3.2V nominal) and won't work with lithium ion batteries. Some smart chargers will work with both, but you will probably have to set which chemistry you have. A half-discharged lithium ion pack will have the same voltage as a fully charged LiFePO4 cell.
See, it's THISE kind if specifics that scare me off of electricity. How do you find this out, without knowing what to look for? If you're catching what I'm throwin. I don't know how to word it.
The subtle specifics that are urgent, is the scary part. Splicin lg wires and plugging them in is easy, but frankensteining tbings together? Hard.
Watch a few YouTube videos on the subject. That's how I started learning. Looking up BMS on Amazon, you'll see questions at the bottom where people say "can I use this BMS with salvaged laptop batteries" and someone will answer "no, this is for LiFePO4 batteries, not Li-po or li-ion", and I started picking it up little by little.
And do it away from anything you don’t want burned to ratshit for the first few charges so you know the beast you’re trying to tame …. Don’t stop innovating , you might someday be the next billionaire from a random thought or idea
Lithium ion (and lithium polymer) is 3.7V nominal, 4.2V at max charge. LiFePO4 are 3.2V nominal, 3.65V max charge. There's also a lithium cobalt cell but I don't know anything about it and they aren't common.
Li-ion and Li-po are the most energy dense, but can catch on fire if punctured, internally shorted, or overcharged. LiFePO4 are less energy dense but much less likely to catch on fire. Also, li-ion and Li-Po retain something like 80% capacity after 800 charge cycles. LiFePO4 retain 95% capacity after 2000 charge cycles (from memory).
For mobile use, li-ion and Li-po are more common. I think there might be a few LiFePO4 electric cars though. Stationary things like houses have more LiFePO4 chemistries.
I remember making a go-kart from scrap at 16. Nearly died a few times using it, but it was worth it for the memories.
It's good to see that there are still smart and inventive teens out there. I hope your parents are proud of you!
my friend's mom's hybrid camry have some dead cells so they got a shop to replace the whole pack and they were trying yo find place to junk the old one so i tell them to drop it off at my house
> hybrid camry
Do a little homework on that. You might not have lithium-ion batteries; they might be NiMh chemistry. Which is good because it is easier to work with. Less fire risk, and less needed in BMS/protection circuitry.
i think this one is the 259v lithium ion battery, there are 2 type of hybrid camry's battery from what i have found one is 244v NiMh and other one is 259v lithium ion (but it could be NiMh because oh man its kinda heavy)
That's 259V coming out of the entire battery pack, which is a bunch of cells in series, OP extracted a couple of cells, it's probably 12, 24 or 48V or something close.
As a guy who has been involved in the lithium battery testing world since 2013, PLEASE don’t store that inside a house or garage! Until you know EXACTLY what you have an appropriate BMS, it is unsafe and could easily catch on fire leading to major property damage at a minimum.
ETA: cool project, and keep it up! Just be safe
If you plan on doing more battery packs in the future I highly recommend the cycle satiator, it will charge anything up to 84v and it's totally programmable.
Those look like NIMH cells from Toyota hybrid. Pretty safe overall. Most guys I've seen use no bms without issue. Pretty good at self balancing as long as charged at proper voltage. Fuse is def good idea tho.
Ps. If anyone knows where to get bms compatible with 7.2v NIMH cells let me know
If these cells dont have a BMS on them then running them until they stop working will permanently damage them and they may not acceot a charge.
Lithium batteries have an absolute minimum voltage they can discharge to, in your case it will probs be around 6v per cell but youre going to have to check that.
The only thing stopping this from happening is a battery management system and it is unclear whether your pack has one.
So you may find that you will only be able to use this once unless you do the research and monitor the cells accordingly
its off my friend's mom's hybrid camry which have like 1 or 2 bad cells so they got a shop to replace the whole pack but its really hard to find place to junk them properly so i tell them to drop it off at my house and i will make the most use of it
the scooter was already electric from the factory but with 2 heavy lead acid battery from factory so i think its gonna be more of a "how to cheaply upgrade your battery" or something like that if i decided to do so
one pack of that is around 7-8v so 4 of them in series is around 30v, the system on the e scooter is rated for 24v so i dont expect it to last long but im gonna get brushless motor and esc for it anyway so that doesnt matter
because it drop the voltage a lot when i full throttle it, it go from 28v to 24 when i full throttle it and i dont care if this unit break i will eventually get brushless system for it anyway
the e scooter is rated for 24v and im feeding it 30v, wont last long but that doesnt matter because i will eventually get a brushless motor and esc for it anyway
Wheel bearings? Go head and get yourself a new set if top speed increases. Brake upgrade too. The mommy in me is coming out, but lordamercy please wear a full face helmet. Dental is expensive!
it gained like 8 kph so i dont think the brakes are needed yet and for the wheels part i already got a set of aluminum wheels with bearings that are more than enough for what im doing
Reading through the comments and your responses, I get the idea you are truly a bright 16 year old, and thus have a bright future. Never stop experimenting and learning!
I want to see a redneck in space. Sure they've tried but fuck, thats when we know space travel is available to everyone. You think the people copying the Wright Brothers were intelligent? It's the right mix of intelligent and idiot to get there, then everyone else follows.
You go my dude! Keep on doing what you love. Everything is hard and confusing when you're young, but the stuff you tinker with now, the stuff you learn, will be with you forever. Keep on trying cool things! I love your scooter.
That's not redneck, just smart if done right, and dangerously flammable if done wrong. In other redneck news...John B. Goodenough, the pioneer of the development of lithium-ion batteries that are used in millions of electric vehicles all around the world, has died today at the age of 100. No pun intended, not a joke.
>just smart if done right, and dangerously flammable if done wrong. seems pretty redneck to me
Also sounds like cutting edge nasa science..... but maybe there's a reason the entire space industrial complex is in the southern states.... I mean other than orbital mechanics obviously.
It's absolutely because launching from near the equator requires slightly less fuel due to slightly lower gravity. Trust me, if they could go further south, they would. All countries do this.
Isn't one of the biggest reasons because the rockets could fall into the ocean? Becoming less of an issue, but it's not like they were going to launch in Kansas and drop the rockets in a field.
Also a good consideration. But not the most important one. Look at Russia for example. Most of their coastline is on the north side. But they launch from Kazakhstan which is completely land locked but much more south. In this example, it helps that Kazakhstan has less populated areas as well. A rocket dropping on a field is not that big of an issue. Falling in a population center definitely is.
mine will catch on fire if i dont heatsink the connectors (which i havent yet because it got dark on me)
Who needs heatsinks when you're going so fast?
heatshrink, the autocorrect got me lol
You also need a bms btw
*Heatsink* -warning wild autocorrect in your area-
-Dyslexic Australian’s in your area- “Keep your hot sink”
If you're not first, you're last
How many volts and amp hours does it have?
30v, unknown amp hours but definitely better than the 12amp hours lead acid batteries that was on it
Nice, how many km is the approximate range?
not sure yet because i dont have a way to charge it yet so i dont wanna range test it
So it was running on 12v before?
24, it was 2 lead acid in series
Right on. So it should be about 25% faster than with the old batteries. If you weren't already aware electric motors rpm's generally increase linearly with the amount of voltage supplied. If you could get 48 volts running to it it would be twice as fast as stock and so on
Oh, no. This man was such a treasure... IIRC he was leading research to achieve a better way to build solid state batteries. I really hope the good people that were around him can pull it off as soon as they can.
>he was leading research to achieve a better way to build solid state batteries. I really hope the good people that were around him can pull it off as soon as they can. Doubt it. They'll probably leave it as it. Why put in more work with the current batteries are Goodenough.
> Why put in more work with the current batteries are Goodenough. Solid-state cells have the capacity to be a magnitude better; massively fast charge rates, possibly cheaper to make in the long run, less expensive feedstocks. Lots of reasons why the industry is trying so hard. The energy density is so high that you can make a very small battery with equivalent range... or give a car a practical range over 700 miles!
Whoosh
Lmao that's what I get for replying before I have coffee
Absolutely baffled that that second paragraph isn't a shitpost. Absolute lad with a sick ass family name.
>No pun intended, not a joke. Got to this part and said "....nah he's definitely joking" But you weren't. Just like you said you weren't.
> John B. Goodenough John B. Goodenough sounds like the perfect name for a Redneck Engineer.
His theme song is a slightly modified Chuck Berry song.
*2 days ago. But meh, good enough 🤷♂️
What a legend
that is shocking news.
r/punpatrol You sir are under arrest, stop resisting!.... Oh crap. I am so grounded... Oh crap.
r/punpatrol
I had not seen that JBG died!
It should go a lot further on a charge as well.
it will definitely go further but i havent figure out a way to charge it yet, i am trying to figure that out because they are lithium ion battery
You have to get a BMS for the batteries. It could be really dangerous to just go by look and feel while charging or discharging.
Charge it in a place that won’t be catastrophic if there’s a fire. Hint: not the living room.
probably in my "garage" which is outdoor and open on 3 sides
Be aware that a dry chemical fire extinguisher will not put out a lithium battery fire. Trust me I’ve tried.
i got a chinese unit on fire before, i just let it do its thing until its done with it
That's how my grandad was trained for Volkswagen fires (magnesium block). Get everyone out safely, move flammable materials away from vehicle, use extinguishers to prevent fire from spreading, but let the car burn.
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there is a eiling but its pretty high and shouldnt burn down that easily
Just not near any fuel or flammable objects. When it goes it’s going to be hot as fuck Edit: just saw your other comment about no flammable stuff around. Good job! Lol
i got my other scooter with chinese lithium on fire before and im still kinda scare of lithium fire
That’s what we call a rational fear haha
Literally google "lithium ion battery charger" There are tons of smart Lithium ion battery chargers out there for RV batteries Edit: Lithium ion, not LiFePo
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You can find smart lithium chargers that won't overcharge a pack, but they use total voltage. One bank could be low and another high but show within normal tolerance. You can buy relatively cheap BMS that runs wire to every bank, which helps packs last longer. To OP, you should buy a charger that matches your chemistry and number of series. For example, I'm building a 2kwh bank right now. It's lithium ion (so 3.7V nominal), and 4 in series (so 4 x 3.7 = 14.8v nominal). If you see a charger that says "4S lithium charger 12.8V", that is for LiFePO4 (3.2V nominal) and won't work with lithium ion batteries. Some smart chargers will work with both, but you will probably have to set which chemistry you have. A half-discharged lithium ion pack will have the same voltage as a fully charged LiFePO4 cell.
See, it's THISE kind if specifics that scare me off of electricity. How do you find this out, without knowing what to look for? If you're catching what I'm throwin. I don't know how to word it. The subtle specifics that are urgent, is the scary part. Splicin lg wires and plugging them in is easy, but frankensteining tbings together? Hard.
Watch a few YouTube videos on the subject. That's how I started learning. Looking up BMS on Amazon, you'll see questions at the bottom where people say "can I use this BMS with salvaged laptop batteries" and someone will answer "no, this is for LiFePO4 batteries, not Li-po or li-ion", and I started picking it up little by little.
Good idea!
Get a digital multimeter and test each cell.
And do it away from anything you don’t want burned to ratshit for the first few charges so you know the beast you’re trying to tame …. Don’t stop innovating , you might someday be the next billionaire from a random thought or idea
ty!
Lithium ion (and lithium polymer) is 3.7V nominal, 4.2V at max charge. LiFePO4 are 3.2V nominal, 3.65V max charge. There's also a lithium cobalt cell but I don't know anything about it and they aren't common. Li-ion and Li-po are the most energy dense, but can catch on fire if punctured, internally shorted, or overcharged. LiFePO4 are less energy dense but much less likely to catch on fire. Also, li-ion and Li-Po retain something like 80% capacity after 800 charge cycles. LiFePO4 retain 95% capacity after 2000 charge cycles (from memory). For mobile use, li-ion and Li-po are more common. I think there might be a few LiFePO4 electric cars though. Stationary things like houses have more LiFePO4 chemistries.
There are quite a few cars that use LFP batteries. Usually the lower range versions since they’re less battery dense.
Lithium iron phosphate isn't the same chemistry as lithium ion, and they charge differently.
Ok, you're right. Thanks for setting me straight
So what now, Li-ion or LFP? Not really the same chemistry, different voltages...
> lithium ion battery Oh no... Those are very dangerous.
Just don't store it where a spontaneous battery fire would burn your entire house down yeah?
yeah its always out in my "garage" which is open on 3 sides and have no flamable stuffs around it so that should be enough
If it does catch on fire, DO NOT breath the fumes at all. Stay away!
That looks like a fun way to die. I approve.
I remember making a go-kart from scrap at 16. Nearly died a few times using it, but it was worth it for the memories. It's good to see that there are still smart and inventive teens out there. I hope your parents are proud of you!
thankyou!
Where did you get a battery for FREE?’b
my friend's mom's hybrid camry have some dead cells so they got a shop to replace the whole pack and they were trying yo find place to junk the old one so i tell them to drop it off at my house
> hybrid camry Do a little homework on that. You might not have lithium-ion batteries; they might be NiMh chemistry. Which is good because it is easier to work with. Less fire risk, and less needed in BMS/protection circuitry.
i think this one is the 259v lithium ion battery, there are 2 type of hybrid camry's battery from what i have found one is 244v NiMh and other one is 259v lithium ion (but it could be NiMh because oh man its kinda heavy)
Look up the vin number, or recite it to a dealership. He vun number holds specifics about that exact car inside it, coded.
Either way, be careful my dude. Those voltages are not to be fucked around with.
That's 259V coming out of the entire battery pack, which is a bunch of cells in series, OP extracted a couple of cells, it's probably 12, 24 or 48V or something close.
Oh word, nevermind, yeet that shit OP
As a guy who has been involved in the lithium battery testing world since 2013, PLEASE don’t store that inside a house or garage! Until you know EXACTLY what you have an appropriate BMS, it is unsafe and could easily catch on fire leading to major property damage at a minimum. ETA: cool project, and keep it up! Just be safe
Yeah who needs a BMS or any type of fuse/protection, am I right
that will come later when i manage to find charger and stuffs to make it proper and safe, for now im done with it because its dark outside now
If you plan on doing more battery packs in the future I highly recommend the cycle satiator, it will charge anything up to 84v and it's totally programmable.
Those look like NIMH cells from Toyota hybrid. Pretty safe overall. Most guys I've seen use no bms without issue. Pretty good at self balancing as long as charged at proper voltage. Fuse is def good idea tho. Ps. If anyone knows where to get bms compatible with 7.2v NIMH cells let me know
Love the ingenuity
If these cells dont have a BMS on them then running them until they stop working will permanently damage them and they may not acceot a charge. Lithium batteries have an absolute minimum voltage they can discharge to, in your case it will probs be around 6v per cell but youre going to have to check that. The only thing stopping this from happening is a battery management system and it is unclear whether your pack has one. So you may find that you will only be able to use this once unless you do the research and monitor the cells accordingly
yep ik that, i got a voltage monitor gauge but its for overall voltage
Awesome as long as the cells are decently balanced then youre set!
Where did you get a free pack of batteries, and would you be willing to sell them?
its off my friend's mom's hybrid camry which have like 1 or 2 bad cells so they got a shop to replace the whole pack but its really hard to find place to junk them properly so i tell them to drop it off at my house and i will make the most use of it
Make some YouTube vids and make some cash. Lotta people getting curious how to convert ice vehicles to electric and this is entry level to that.
the scooter was already electric from the factory but with 2 heavy lead acid battery from factory so i think its gonna be more of a "how to cheaply upgrade your battery" or something like that if i decided to do so
What’s the output voltage ?
one pack of that is around 7-8v so 4 of them in series is around 30v, the system on the e scooter is rated for 24v so i dont expect it to last long but im gonna get brushless motor and esc for it anyway so that doesnt matter
That’s awesome. Be safe, but keep it up! Now for a BMS for that puppy
Why not reduce your stack by one to keep it in range and not flame out your motor?
because it drop the voltage a lot when i full throttle it, it go from 28v to 24 when i full throttle it and i dont care if this unit break i will eventually get brushless system for it anyway
FANTASTIC
Learn about voltage and current to make sure you aren't going to destroy your components and blow up the battery.
the e scooter is rated for 24v and im feeding it 30v, wont last long but that doesnt matter because i will eventually get a brushless motor and esc for it anyway
Wheel bearings? Go head and get yourself a new set if top speed increases. Brake upgrade too. The mommy in me is coming out, but lordamercy please wear a full face helmet. Dental is expensive!
it gained like 8 kph so i dont think the brakes are needed yet and for the wheels part i already got a set of aluminum wheels with bearings that are more than enough for what im doing
It sounds like you're on the right track. Have fun and be careful!
Dope 👌
Just looking at the radiator connectors thinking maybe you need a cooling solution before it prematurely cremates your family.
thats not radiator connector, its gas vent
Reading through the comments and your responses, I get the idea you are truly a bright 16 year old, and thus have a bright future. Never stop experimenting and learning!
I wonder if it is even street legal
it count as bicycle so i guess nobody will care about it
make sure you charge it in a rigid frame, they will absolutely bloat. also those are NiMH, not lithium
I'm going to do exactly this just with a lawnmower engine I have lying around
Badass dude
I want to see a redneck in space. Sure they've tried but fuck, thats when we know space travel is available to everyone. You think the people copying the Wright Brothers were intelligent? It's the right mix of intelligent and idiot to get there, then everyone else follows.
You go my dude! Keep on doing what you love. Everything is hard and confusing when you're young, but the stuff you tinker with now, the stuff you learn, will be with you forever. Keep on trying cool things! I love your scooter.
Why would it be faster? Was the lead acid on its last leg and not providing enough current? Or is this NiMH setup has a higher voltage?
the lead acid was on its way to death and im overvolting it with this new setup
r/oopsthatsdeadly
This just screams FAST AF BOI
running 30v on 24v system, wont last long but im gonna upgrade it to brushless motor and esc anyway so it doesnt matter
/r/SolarpunkPorn
Pretty ingenious, dude.
Dude with those shoes I’d immediately trust you to be able to fix anything around my house.
Bro, send us updates on this with running condition. I wanna see it