Victpower A123 20AH 48volt battery pack

[redstone02]

http://victpower.en.alibaba.com/product/629725139-211943958/Newest_A123_48V20AH_rechargeable_lifepo4_battery_pack_for_scooter_or_Ebike.html

Hello,

While looking into Victpowers A123 20AH pouch, I found where victpower offers an assembled pack.
Got a quote for $397.00 + $260.00 DHL shipping for a 48 volt pack with 20A-40A BMS and 3 ampere charger.
Anyone have experance with Victopower packs?

Thanks,
Red

 

[ambroseliao]

Do a search for Victpower and A123. You'll find lots of info here.

 

[ohzee]

Still that shipping seems a bit high doesnt it ? I thought when I bought my 35 a123 cells it was like 130$ us.
I could easily be wrong just seemed high to me.

 

[ambroseliao]

I would assume (Uh-hum) that the high price was for the assembled packs which are bulkier. IMBW!

 

[redstone02]

Do a search for Victpower and A123. You'll find lots of info here.

Found zero for an assembled pack but lots for cells (or pouches).
Looks like it is a new product.
Got it see if this will fit my bike.
Looks good.

 

[redstone02]

Still that shipping seems a bit high doesnt it ? I thought when I bought my 35 a123 cells it was like 130$ us.
I could easily be wrong just seemed high to me.

wow! 35 cells!
Yeppers, I'll double check shipping foy my 16.
Who was the carrier, you recall?
Thanks,
Red

 

[dnmun]

why did you say it looks good?

no info on the BMS or charger.

remember, these guys do not normally assemble battery packs. there is no documented report of how the pack is assembled and how they make the interpack connections and the sense wire connection.

the packs in the picture were taken on someones kitchen table. professional kitchen i guess.

i think cwah did buy a pack from them so ask him.

surface shipping will be less.

 

[ohzee]

Still that shipping seems a bit high doesnt it ? I thought when I bought my 35 a123 cells it was like 130$ us.
I could easily be wrong just seemed high to me.

wow! 35 cells!
Yeppers, I'll double check shipping foy my 16.
Who was the carrier, you recall?
Thanks,
Red

It was also DHL who shipped it to me. I bet I can find my receipt somewhere if I look hard enough. Still it was in the 130-40 range.

 

[redstone02]

why did you say it looks good?

no info on the BMS or charger.

remember, these guys do not normally assemble battery packs. there is no documented report of how the pack is assembled and how they make the interpack connections and the sense wire connection.

the packs in the picture were taken on someones kitchen table. professional kitchen i guess.

i think cwah did buy a pack from them so ask him.

surface shipping will be less.

Looks like a tiled factory floor to me... maybe if a wok or egg-roll or even a bowl of egg drop soup was in the photo I would agree.
Looks good as in an assembled A123 pack; no buying parts from all over world to get a A123 pouch battery pack, looks good from that standpoint.
Cellman is out of stock at this time.
The darkside is drawing me in... this may I may keep from buying LiCo...
Thanks for the tip re: cwah!

Regards,
Red

 

[cwah]

My pack is still working fine.

Where are you located? Group purchase can lower the cost.

 

[redstone02]

My pack is still working fine.

Where are you located? Group purchase can lower the cost.

Hey Cwah! Just fixin' to drop you a pm. Thanks for the reply!
Decatur, AL (US)
I'm too anal for a group buy, looking at the for sale new area there is one going sour now. But if I was in charge I would feel better but I'm a newbie here, so the feeling would flip :lol: .

How many cycles does your pack have to date? You a happy man with the pack? Just found your thread... love the lighing, might copy you on that. How are the AH holding up?
Charger looks good. My quote was with a 3 ampere charger... a bit light.

Best Regards,
Red

 

[999zip999]

A123 20ah get a big charger 5a to 10a is fine if you can it all shipped at the same time.

 

[redstone02]

Just received my 16S pack this morning. Shipped to my work address, so please forgive my eager first post regarding this pack.
The pack was shipped by TNT Express http://www.tnt.com/express/en_us/site/home.html
Shipping date was Oct 19.
I received Oct 23.
Received pack voltage = 52.8 volts. Measured with a new Ideal #61-480 meter (I’ve checked it against a couple of Flukes = ok).

Got an eager beaver question regarding the balance leads to BMS: There are two sets of balance leads. One with 8 wires, the other with 7 wires.
Sorry if this a dumbass question, please ignore if so. I can probe tonight but I’m a total n00b and any pointers would be greatly appreciated.
Should there not be 16 balance wires?
Looking to attach tow CellLog 8S loggers and looking for pointers. Hate to release the magic smoke in the loggers and/or BMS.

Going to run a couple of discharge cycles this weekend. I have some Maxim DS18B20 temp probes that I can cobble together with an Arduino using serial output to monitor 1C output (maximum load I have).

Thank you for any pointers that would help me avoid pitfalls.

Cordially,
Tom

 

[ohzee]

it's common for the BMS's to use the negative connector as a type of included balance lead.
I may not be explaining it 100% , but that's how a couple of mine have been.
24s BMS 23 wires 20s BMS 19 wires.

 

[redstone02]

This may help:

 

[redstone02]

it's common for the BMS's to use the negative connector as a type of included balance lead.
I may not be explaining it 100% , but that's how a couple of mine have been.
24s BMS 23 wires 20s BMS 19 wires.

Like what is shown here?

 

[ohzee]

Like this here.. This is the ping BMS wiring diagram.

Start with the first grey to the left of the positive red count 15 left including the 1st black.
The 16th sense wire is included on B- so that's how yours should be if it seems like your missing
one. Make sense ?



Found the cell_man BMS diagram also.

 

[redstone02]

Thank you Ohzee!
99% clear to me and gives me a point of beginning for probing/wiring for the CellLogs.
Regards,
Tom

 

[999zip999]

Now let's cut it open to see how they did the batteries taps. That's o.k. no worries. What size is the pack. How the fit on your bike ? And what voltage does the charger put out ? What was the total price ? You mean I only get one question. Thanks

 

[redstone02]

Now let's cut it open to see how they did the batteries taps. That's o.k. no worries. What size is the pack. How the fit on your bike ? And what voltage does the charger put out ? What was the total price ? You mean I only get one question. Thanks

Nope, no surgery if possible.
Going to probe the balance taps and negative terminal for 2 x CellLog 8S. The temp probes will be taped and insulated to pack and BMS. Got a "Watts Up" meter for discharge and charge.
It is a 16S 20AH w/A123's.... I hope.
Hopefully in the triangle of the bike; got a cm +/- to play with... so kinda tight.
$397.00 + $260.00s/h w/5 ampere charger.
Have not measured charger yet.

Looks like Cell-Man has lowered his price from my quote.... bummer would have paid a few more $ (not $$$) for his testing and presence on the board.

 

[ohzee]

I made that comment last night about cell_man lowering his a123 prices some.

I was not sure , but glad to see you think the same.. I wondered how the influx of cheap a123 cells
would impact those type of sale for him. i know his cells are of a better quality etc.

 

[999zip999]

Maybe build a sheet metal tray to fit the bottom of your battery as to clamp in the Y and with velcro top tube straps. love the triangle layout. You can always improve on it later. I use a paper template for the tray and pop rivet the corners from the inside ect. Just want to hear the road test. Good luck

 

[redstone02]

Maybe build a sheet metal tray to fit the bottom of your battery as to clamp in the Y and with velcro top tube straps. love the triangle layout. You can always improve on it later. I use a paper template for the tray and pop rivet the corners from the inside ect. Just want to hear the road test. Good luck

Great minds think alike

 

[999zip999]

Great minds I must have stole the idea from someone else. If it fits tight great just and long as it fits. I had to dent the front bottom edge to conform. I tied a rock to the end of a stick worked great.

 

[redstone02]

Is this an Anderson SB50?
If so, I am correct that Anderson connector do not have gender?
Thanks,
Tom