Doctorbass
100 GW
agniusm said:
Agniusm were they charged or discharged when you did that test ?.. because it make a huge difference on the result!
Doc
A123 AMP20M1HD-A Battery pack kit
- Thread starter agniusm
- Start date
Agniusm were they charged or discharged when you did that test ?.. because it make a huge difference on the result!
Doc
agniusm
1 MW
Charged, storage, 3,32V
arkmundi
10 MW
What the fracking cell^*&^*&^%! Before you destroy anymore, send them to me, please! OK already, the cells can take a lot of abuse without being hazardous. Is there some way to translate that into li-ion shipping policies? We're all going to pay an unnecessary premium for hazmat shipping it seems!agniusm said:
megacycle
100 kW
tome said:
Hi Tom was hoping to find some information to aid in answering your question.
As Arkmundi was referring to, there's many different ways.
This area is like opening a can of worms and was looking it up too in relation to lifepo4 and so hope the information on this excellent site by Albert Van Dalen ( who I think has contributed to this site a fair bit too). http://www.avdweb.nl/solar-bike/electronics/bms.html
Everyone seems to have a different take on charge/discharge bms parameters etc.
In relation to resistive types seems for simple operation they bleed charge from the good cells to drop down with the cell that hit the lvc mark first, which should be the lowest capacity cell.
I'm hoping the capacitor bms that Ohzee and myself have bought might help give better capacity in this respect, but havnt tested them yet too busy building etc.
There was another ES thread relating mainly to bottom balancing quite a few knowledgeable people inputting http://www.endless-sphere.com/forums/viewtopic.php?f=14&t=27263&hilit=bottom+balancing
Must warn I had a headache afterwards :?
agniusm
1 MW
whatever said:
Those cells were damaged, punctured and lost vacuum. Occasionaly everybody has to have some fun.
999zip999
100 TW
The cell measure 2.8v before test and after test 3.3v. Great fast charge.
megacycle
100 kW
tome said:
No worries bud, hope you were able to sort through it all,you'd be smarter than most, I still got a headache
megacycle
100 kW
Just had a 2nd look at those +&- connecting studs on the kit, might be better with a cut out in the pcb so the connecting lugs can sit on the end blocks.
At the moment the lug looks like it is clamped down on the pcb.
If it is taken from the brass stud, would be better with edit: brass nut and washer either side of the lug
not as good for connectivity as actually clamping down on the block as long as the block is not trying to move when the nut & washer set clamp down.
At the moment the lug looks like it is clamped down on the pcb.
If it is taken from the brass stud, would be better with edit: brass nut and washer either side of the lug
not as good for connectivity as actually clamping down on the block as long as the block is not trying to move when the nut & washer set clamp down.
agniusm
1 MW
When i was designing it i saw it as an issue running high current. It does however hold OK on lower currents. I had to rethink end connectors and on this bulk introduced copper. Thing with this aluminium alloy and brass is that they are about 42% conductivity of copper. Anyway there will be no issue since now even for high currents.
If required i will have some spare copper terminals and it is just a matter of drilling 4 x 4mm holes and slotting top plate then swapping terminals. I will include sketch with measurements later.
For people who ordered kits, i contacted PCB manufacturer and they said that it will be ready friday or beginning of the next week. All other bits required are with me. No word from block manufacturer thou, they are slower as usual. I will have first samples of 18S and 30S if someone requires along with the new design 3P1S. Will just need to manually make few copper terminals for 3P1S.
Cheers
If required i will have some spare copper terminals and it is just a matter of drilling 4 x 4mm holes and slotting top plate then swapping terminals. I will include sketch with measurements later.
For people who ordered kits, i contacted PCB manufacturer and they said that it will be ready friday or beginning of the next week. All other bits required are with me. No word from block manufacturer thou, they are slower as usual. I will have first samples of 18S and 30S if someone requires along with the new design 3P1S. Will just need to manually make few copper terminals for 3P1S.
Cheers
megacycle
100 kW
That looks a great mod so you can lug down onto a copper block.
As it is it is not electrically or mechanically sound, as the current carrying face is always made on the bottom of the lug and presently the current is mainly having to go through the top of the lug and through a steel nut and through the brass stud with obvious results.
As it is it is not electrically or mechanically sound, as the current carrying face is always made on the bottom of the lug and presently the current is mainly having to go through the top of the lug and through a steel nut and through the brass stud with obvious results.
agniusm
1 MW
Hey. So PCB's are done, they usually don't take long to make. Asked when the blocks will be finished, they gave me answer 3 to 4 weeks . Thought they will have more approximate date. I will get PCB's on Friday so will upload few photos. Now boys and girls i need some opinion/help on center hub system i am working on now. i don't have too much mechanical knowledge and going by examples and common sense. Thought this thread is visited more than the other one, check it out: http://endless-sphere.com/forums/viewtopic.php?f=2&t=42257&p=630650#p630650
. Thought they will have more approximate date. I will get PCB's on Friday so will upload few photos. Now boys and girls i need some opinion/help on center hub system i am working on now. i don't have too much mechanical knowledge and going by examples and common sense. Thought this thread is visited more than the other one, check it out: http://endless-sphere.com/forums/viewtopic.php?f=2&t=42257&p=630650#p630650
megacycle
100 kW
Would a kind of nuvinci design work?
I havnt seen a design for a steering application usually gearing but if a hub had 1/2 shafts
and a nuvinci gear either side could this be set to steer as one side could be rotating faster than the other not sure, might not be simple either.
I havnt seen a design for a steering application usually gearing but if a hub had 1/2 shafts
and a nuvinci gear either side could this be set to steer as one side could be rotating faster than the other not sure, might not be simple either.
agniusm
1 MW
Found another firm who said could manufacture blocks in 1 to 2 weeks and located in same town as PCB manufacturers. Think logistics 
Checking out if they can meet the quality i need. PCB's are made and i will have them tomorrow, will inspect if all is made to the standards. Cheers
Checking out if they can meet the quality i need. PCB's are made and i will have them tomorrow, will inspect if all is made to the standards. Cheers
agniusm
1 MW
Arranged with new firm, block should be made in two weeks. Got PCB's, here's 30S, 24S, 18S, 16S, 12S, 4S and 3P1S to compare size visually:
30S
24S
18S
16S
12S
30S
24S
18S
16S
12S
agniusm
1 MW
???oni said:agniusm said:
999zip999
100 TW
Carry on soldier.
agniusm
1 MW
Hi. I am going away to Malta on 13th of September. I hope the blocks will be ready on 12th so i can ship them out before i leave. If not, i am coming back 20th and will ship them on 21th, 22th of September. Going away to Russia on 28th of September, coming back on 2nd of October thou i will try to get online time to time. Sorry for any inconvenience.
Doctorbass
100 GW
agniusm said:
Dohh!.. i hope you'll be able top ship on 12th september :lol: i've been waiting so long to get these since the first batch you made
Doc
arkmundi
10 MW
Worth the wait. Being a small scale operator, you'll need and should be patient. I recommend anyone wanting to do an A123 AMP20 pack act in this round. I believe the supply of cheap cells is going to dry up and thence only expensive, at value cells will be available. We're talking upwards to 4 times current costs.Doctorbass said:Dohh!.. i hope you'll be able top ship on 12th september :lol: i've been waiting so long to get these since the first batch you made
captain387
100 W
arkmundi said:Worth the wait. Being a small scale operator, you'll need and should be patient. I recommend anyone wanting to do an A123 AMP20 pack act in this round. I believe the supply of cheap cells is going to dry up and thence only expensive, at value cells will be available. We're talking upwards to 4 times current costs.Doctorbass said:Dohh!.. i hope you'll be able top ship on 12th september :lol: i've been waiting so long to get these since the first batch you made
Yes DoctorBass, a small scale operator is a tricky time consuming job...didn't you know...lol :wink:
agniusm
1 MW
Agree. i myself is a customer and sometimes waiting for the stuff is agony. I am trying my best on making things happen as fast as i can as satisfied customer is always may priority regarding product quality, customer support and delivery timings.
This is still in arrangement stage and i have already found different manufacturer to cut down manufacturing time by half (4 weeks to 2 weeks).
Remember, it took Victpower to deliver my cells almost the same time span as for me making the kits. I understand Doctorbass as he was waiting for hes kits from the beginning, but that was firs run i thought i will be in deep hole with no one buying my kit therefore sold first come first serve bases. Wages here are 400USD per month average, so the margin of what you can risk on are slim.
Sorry again boys and girls but your kits will be delivered with max of 8 days delay.
Regards
This is still in arrangement stage and i have already found different manufacturer to cut down manufacturing time by half (4 weeks to 2 weeks).
Remember, it took Victpower to deliver my cells almost the same time span as for me making the kits. I understand Doctorbass as he was waiting for hes kits from the beginning, but that was firs run i thought i will be in deep hole with no one buying my kit therefore sold first come first serve bases. Wages here are 400USD per month average, so the margin of what you can risk on are slim.
Sorry again boys and girls but your kits will be delivered with max of 8 days delay.
Regards
Doctorbass
100 GW
agniusm said:
big thanks for all effort agniusm! :wink:
Doc
itsmedc65
10 mW
Hi agniusm,
I know you are busy travelling and being self employed is never easy. Have been watching your thread on the A123 AMP20M1HD-A Battery pack kit since the first run. Hope you were able to order some extra 12S and 16S kits. I will finally have the money to order the batteries soon and want to use your kits.
If you have an extra 12S and an extra 16S let me know. Also what is the final price on those. Last I saw was
12S-102USD
16S-122USD
Is that still the final price?
I know you are busy travelling and being self employed is never easy. Have been watching your thread on the A123 AMP20M1HD-A Battery pack kit since the first run. Hope you were able to order some extra 12S and 16S kits. I will finally have the money to order the batteries soon and want to use your kits.
If you have an extra 12S and an extra 16S let me know. Also what is the final price on those. Last I saw was
12S-102USD
16S-122USD
Is that still the final price?