A123 AMP20M1HD-A Battery pack kit

[docnjoj]

I think they are customize for Ping to 3.85-3.9v. The headways like a lower hvc. So what BMS limits for A123 in real life. ? Docnjoj let us know your choice.

I'm hoping for 3.65v. That seems to be the correct charge level for these cells. Is that correct 999zip999?
otherDoc

[agniusm]

I think they are customize for Ping to 3.85-3.9v. The headways like a lower hvc. So what BMS limits for A123 in real life. ? Docnjoj let us know your choice.

I'm hoping for 3.65v. That seems to be the correct charge level for these cells. Is that correct 999zip999?
otherDoc

Have you checked those links i gave you regarding BMS? I think the price will work out roughly the same but you will have an option to change LVC and HVC on the fly through your lapy. Few other parameters you can fiddle about. It makes it future proof.

[docnjoj]

I think they are customize for Ping to 3.85-3.9v. The headways like a lower hvc. So what BMS limits for A123 in real life. ? Docnjoj let us know your choice.

I'm hoping for 3.65v. That seems to be the correct charge level for these cells. Is that correct 999zip999?
otherDoc

Have you checked those links i gave you regarding BMS? I think the price will work out roughly the same but you will have an option to change LVC and HVC on the fly through your lapy. Few other parameters you can fiddle about. It makes it future proof.

I did but they don't seem to list prices.
otherDoc

[agniusm]

PM Linukas on forums. He buys them bulk, he might give you the price.
http://endless-sphere.com/forums/viewtopic.php?f=14&t=35696

[docnjoj]

OK thanks I will do that now!
otherDoc

PM sent to Linukas

[agniusm]

Got some nice stuff to build my test rig for lots of current. 6 x 1000W light bulbs at 24V. Hock them up in parallel and we have 6kW.




...so if my math is right i should be pulling 275amps. Will see the tops

[docnjoj]

Well I just solved the BMS problem! I bought a Hyperion 1420i and will run without one. Those cells are about 18ah worst case, and we ride standard routes so we normally use only about 13 ah at most. I figure it is worth trying out since I never overuse my batteries. I'll just balance charge every cycle if necessary and maybe even use Kfongs LVC switch as extra protection. It works great on my wifes bike where we run a 10 ah Ping // with 6 Fatpacks. We pedal all the time so usually get about 25 mile range. Obviously I'll monitor the new pack with either cellogs or a whatmeter. Problem solved, I hope.
otherDoc

[agniusm]

For the first bulk have soldered connectors to PCB's so will have less work There is one firm that i am negotiating block manufacture as it looks like it is hard to work with brass and perimeter routing cost lots of router bits. Man from the firm is looking for a solution to fit in a budget.

[docnjoj]

They look great but I have a question. What kind of connectors are they and are they compatable with the regular JST-XH types that are used for balance charging?
otherDoc

[TheWizard]

Got some nice stuff to build my test rig for lots of current. 6 x 1000W light bulbs at 24V. Hock them up in parallel and we have 6kW.

...so if my math is right i should be pulling 275amps. Will see the tops

East German bulbs?! You definitely need to give that rig a good James Bond-style bad-guy superweapon name.

[agniusm]

They look great but I have a question. What kind of connectors are they and are they compatable with the regular JST-XH types that are used for balance charging?
otherDoc

Female connector and corresponding number of pins are included in the kit. Most BMS comes with JST on one end and bare wires on the other. This is why i did it this way. All included
They are 3.96mm NSK, NSG connectors. JST are smaller, harder to work with for novice users and not locking. These are larger, clips in securely easy peasy job

[agniusm]

Got some nice stuff to build my test rig for lots of current. 6 x 1000W light bulbs at 24V. Hock them up in parallel and we have 6kW.

...so if my math is right i should be pulling 275amps. Will see the tops

East German bulbs?! You definitely need to give that rig a good James Bond-style bad-guy superweapon name.

Will do

[docnjoj]

They look great but I have a question. What kind of connectors are they and are they compatable with the regular JST-XH types that are used for balance charging?
otherDoc

Female connector and corresponding number of pins are included in the kit. Most BMS comes with JST on one end and bare wires on the other. This is why i did it this way. All included
They are 3.96mm NSK, NSG connectors. JST are smaller, harder to work with for novice users and not locking. These are larger, clips in securely easy peasy job

That is way cool! Thanks again agniusm. It is clear that you really thought this through in every detail. Great.
otherDoc

[Spacey]

What sort of Amps do you think could be pulled through the kits....300Amps?

[agniusm]

Hi, thanks for the question. This is in series kit for bicycles and i doubt that someone will be pulling 300amps on a bike. I am developing parallel kit as well by request here and my calculation are that it will be able to hold 374 amps. The kit is highly scalable, lots of configurations possible. When finished, it will be available in any series or parallel configuration but will aim to most popular ones. The kit is not cheap i know, but it is hassle free and easy maintainable diffidently from A123 packs with laser welds etc.
I will be offering different terminals for higher current i think to go up to 1000A to use with sort of zilla or netgain controllers and warps..
Cheers

[cassschr1]

how long do the tabs need to be to work with these boards? Will 5/8 inch work?

[The Mighty Volt]

Sorry, I may have missed this, but how much are these units, say, for 24s? Thanks.

[agniusm]

the tabs has to be roughly 8mm long from teflon insulation even 7mm should do.
Estimated price for 24S kit is 136.85USD +shipping and 1$packaging.
Cheers

You can check shipping cost here: http://www.post.lt There is english version button top right corner.
Check the conversion rates here: https://ib.swedbank.lt/private/d2d/payments/rates/currency

[gensem]

Agniusm could you make 7s modules?

I know it sounds like an odd number but im thinking about using 28s A123 wich would end up being 100.8v (same as 24s lipo)

I would also like to know the dimension of a mounted 7s battery kit.

Thanks

[The Mighty Volt]

the tabs has to be roughly 8mm long from teflon insulation even 7mm should do.
Estimated price for 24S kit is 136.85USD +shipping and 1$packaging.
Cheers

You can check shipping cost here: http://www.post.lt There is english version button top right corner.
Check the conversion rates here: https://ib.swedbank.lt/private/d2d/payments/rates/currency

Thank you agniusm , you are very fair.

[agniusm]

Agniusm could you make 7s modules?

I know it sounds like an odd number but im thinking about using 28s A123 wich would end up being 100.8v (same as 24s lipo)

I would also like to know the dimension of a mounted 7s battery kit.

Thanks

Well 28S you can get combining 24S kit with 4S kit. At the moment i am stuck with block fabricators. No one seems to want to make them. A full headache..

[deVries]

I was looking to calculate exactly but it is too complicated. I guess if 20x6.3mm (126mm^2) copper bar is good for 320amps, if i would use 6mm round bar, meaning A=pi r^2=28.26mm^2, i would think that it would be good for 40amps brass or 70amps copper. I might be wrong but then again i am looking more at the clamping of the cells in to the pack and Builder should decide which way to terminate the pack. It is just not viable to design something to individual needs. I need to check current draw in my setup, and i use 14AWG on terminals, BMS and controller are rated at 30A.

These are continuous loads (see above).

What about peak amps & for about how many seconds? Just for estimate purposes.

[gensem]

Well 28S you can get combining 24S kit with 4S kit. At the moment i am stuck with block fabricators. No one seems to want to make them. A full headache..

I see... but I would still like the 7s blocks, so I charge using a regular rc charger and use either 21s or 28s depending on my hub motor kv and controller mosfets.

[agniusm]

I was looking to calculate exactly but it is too complicated. I guess if 20x6.3mm (126mm^2) copper bar is good for 320amps, if i would use 6mm round bar, meaning A=pi r^2=28.26mm^2, i would think that it would be good for 40amps brass or 70amps copper. I might be wrong but then again i am looking more at the clamping of the cells in to the pack and Builder should decide which way to terminate the pack. It is just not viable to design something to individual needs. I need to check current draw in my setup, and i use 14AWG on terminals, BMS and controller are rated at 30A.

These are continuous loads (see above).

What about peak amps & for about how many seconds? Just for estimate purposes.

I have made my test rig that goes in 45 increments up to 270amps, when i get rest of the stuff made i field test it with temps and timing. I see little point in theoretical estimate as in true life it could be far different.

[agniusm]

Here is the 6kW tester for end terminals i knocked up today. Possible testing at 45A; 90A; 135A; 180A; 225A; 270A: