A123 AMP20M1HD-A Battery pack kit

Yea I do not disagree one bit. I was thinking you could even hit the heads with a glue gun if you wanted.

ill just probably use it normally and see how it goes. I need to weigh this baby it seems like she's a bit heavy.
 
Well as they said in that old Sci-Fi Movie with the Triffids"Contact has been made. All balance wires tested for continuity and surprise, they all work. Even us "old dogs" can learn precision soldering, although I thought I new that from before? Anyways don'tt use shrink tubes on the euro connectors, just solder up the wires and clip off the crimp horns as agniusm suggested. Works good but I will probably re-inforce the wire exit with hot glue like ypedal does.IMG_0373.JPG Now back to the painters tape and all those cells left!
otherDoc
 
Nice work doc - you keep at her man your only as old as you tell yourself you are.

I sure hope I am still playing with this stuff when I am a bit older that moving around keeps ya healthy.

Get us some pics when you get done please. Ill get one up tonight of the finished product. Still trying to think
how I want to compress the cells. Local hw store has nice diamond plate, but im not sure how I could cut it down
to size.. Was thinking use that with long bolts & nuts for compression then maybe wrap in gorillas tape ? yea
not sure what I want to do the weight there also sucks.

Last battery I did layers of plastic, tape, foam padding, tape and it's worked out fine so far.
 
ohzee said:
Get us some pics when you get done please. Ill get one up tonight of the finished product.

Last battery I did layers of plastic, tape, foam padding, tape and it's worked out fine so far.
Click to expand...

One more pic, Ohzee? :mrgreen: I thought you took a bunch more to share? :?

Consider using some fire resistant phenolic end boards/plates maybe? One of our Aussie mates did this & posted about it. :idea:
 
I have some , but it's not all the exciting tho here is with the top plate.

24s3.jpg


Will update once I figure out how I am going to wrap her.
 
ohzee said:
Started my 24s build today. Got tired waiting for my evassemble BMS they somehow messed up my order and let it set 10 days so who knows.

Taking some pics. No issues so far all the comments here really helped a lot. Biggest lessons learned id say is cover up all connections with tape.

did that from the get go and no sparks as of yet.

6 down 18 more to go may take a few days as I don't want to rush we will see.
Click to expand...

Sorry for the delay shipment
It's a typhoon in our destination and have heavy rain in the last five days so we can not issue any order cause we are afraid that goods may get wet which is big trouble for electronic products. According to the weather report, it will be sunny again with effection of the typhoon for heavy rain. So we will be office on even weekend of this week and try to issue all orders include your parcel. It's really a bad sitution for the weather issue. But since it's out of our control and we concern more about safety arrival then any products which will suffer wet trouble so we have to send them after the heavy weather.
We aplogize for the inconvenience but it's really important we can make sure our products will arrive to our clients without demage.

shipment.jpg

We are aplogize for the inconvenience of the local weather in the recent few days.

Best regards,
Michael Cheung

http://www.evassemble.com
EV ASSEMBLE

Mod Edit: Person asked that his name not be shown in picture. We agree.
 
Yea I just hope I am blown away with this BMS because your post was better suited as a PM to me then a general post.

Anyway this is the wrong thread to discuss such things.
 
ohzee said:
I have some , but it's not all the exciting tho here is with the top plate.

Will update once I figure out how I am going to wrap her.
Click to expand...

ETA for more pics? :D

eva-michael said:
Sorry for the delay shipment
It's a typhoon in our destination and have heavy rain in the last five days so we can not issue any order cause we are afraid that goods may get wet which is big trouble for electronic products. According to the weather report, it will be sunny again with effection of the typhoon for heavy rain. So we will be office on even weekend of this week and try to issue all orders include your parcel. It's really a bad sitution for the weather issue. But since it's out of our control and we concern more about safety arrival then any products which will suffer wet trouble so we have to send them after the heavy weather.
We aplogize for the inconvenience but it's really important we can make sure our products will arrive to our clients without demage.
Click to expand...

I can confirm there is a weather problem... ;)
 
Well slow but unsure progress as my wife located some nail lacquer and I managed to clean the traces with isopropol alcohol and apply the stuff to the traces 3 coats (no not the pads for the blocks) It actually shows high electrical resistance so again agniusm comes through. Tomorrow I begin on the second insertion of the 2 6S packs! Finally! I may use gorilla tape as the wrap up near the tabs if it has high electrical resistance but someone said duct tape is conductive. I believe thay meant the aluminum A/C duct tape but I will test before I try it. It really makes sense to use the stronger tape around each individual cell, then wrap the battery in Saran Wrap and then put on the compression covers.
otherDoc
IMG_0374.JPG
 
Docnjoj, Have you looked inside a Ping battery. He uses a foam wheater strip the width of the cell to keep the taps apart, and to line up the pcb broad. Might not help in your deal. I said I was going to use it. But the Durlengh build went o.k.
 
deVries said:
deVries said:
agniusm said:
2. Balance traces are rated at 3amps.
Click to expand...

So each trace can handle 3 amps?
Click to expand...

Agniusm, just so I'm understanding you clearly... I'll repeat...

EACH trace is rated at 3A? Yes? or ?

Thanks. :)
Click to expand...

I'll repeat too, traces 3amps, connector - 7amp. All for individual trace/connector pin. This must be done with.

I have done some testing at 75A. Videos are being uploaded at the moment. The results somewhat confused me. I was running my rig for ~10mins. First i have attached probe to brass bolt and temp rose to ~42C than took of cover plate and connected my wire strait on to the block, thermo probe directly on the block - no significant change. I found out that temp. sensor on icharger is useless. Checked the battery temp and it was at ~50C drawing ~75A for 10 mins. Ambient was around 25C.
 
999zip999 said:
Docnjoj, Have you looked inside a Ping battery. He uses a foam wheater strip the width of the cell to keep the taps apart, and to line up the pcb broad. Might not help in your deal. I said I was going to use it. But the Durlengh build went o.k.
Click to expand...

Oh yes I have had to rebuild my Ping when the BMS drained a few cells in storage. I may use the weatherstripping so the tabs don't flex. Thanks for the reminder! My new MeanWell 24V should arrive today too so I have to get busy. I
m just going to use it for a power supply for the Hyperion to get 7-8 amps charging out of it.
otherDoc
 
I feel pretty good with these cells since I never go over 1.5C at the most. Overkill but still fine for long life!
otherDoc
 
What size is that small section of bus? Warm hey.
Be better taking the main bolted connection straight onto the center phase bolt and throw that short length of bus.
Be better current share then for when you really pumping your big numbers.
 
agniusm said:
I found out that temp. sensor on icharger is useless. Checked the battery temp and it was at ~50C drawing ~75A for 10 mins. Ambient was around 25C.
Click to expand...

In your video you show the icharger probe between cells near/on the aluminum block. What is the probe attached to? How is it attached? It would be useful to see what the probe end-piece looks like.

Anyway, you say that probe did not measure correctly... Have you got a laser probe available too? (I don't know how accurate that is? Anyone know?)

Thank you for the time/effort to do this. You give us real science experiments that are useful too. Superb! :D

I think this proves there is excellent amp output using your kit for ebike applications.

Are you able to calculate the IR of the battery vs cell readings???

Thank you again Agniusm. :D
 
megacycle said:
What size is that small section of bus? Warm hey.
Be better taking the main bolted connection straight onto the center phase bolt and throw that short length of bus.
Be better current share then for when you really pumping your big numbers.
Click to expand...

The bus measures 10x10x50mm minus 3xR3.5mm, minus 1xR8.5mm for the bolts. One can use small copper tube to use as the bus. You just need to flatten 45mm and leave some round tubing so solder/crimp your cable.
For regular use i'd say its ok, but for some bigger numbers minor adjustments are required. Thou what keeps me up at night is the cells. They went up to 50 degrees C and thats 3.75C discharge. Did i got doggy ones from Victpower last winter?!

deVries said:
In your video you show the icharger probe between cells near/on the aluminum block. What is the probe attached to? How is it attached? It would be useful to see what the probe end-piece looks like.

Anyway, you say that probe did not measure correctly... Have you got a laser probe available too? (I don't know how accurate that is? Anyone know?)

Thank you for the time/effort to do this. You give us real science experiments that are useful too. Superb! :D

I think this proves there is excellent amp output using your kit for ebike applications.

Are you able to calculate the IR of the battery vs cell readings???

Thank you again Agniusm. :D
Click to expand...

The icharger probe was left hanging in between the cells. I then have attached it to the middle of the outer cell with tape. This is not on this video, another is coming tomorrow. I have a multi-meter that has a temp. It is more accurate as i tested it elsewhere.
I don't have laser thermometer. I dont have IR meter and iChargers option is inaccurate for these cells.
Thanks for appreciation.
 
agniusm said:
Thou what keeps me up at night is the cells. They went up to 50 degrees C and thats 3.75C discharge. Did i got doggy ones from Victpower last winter?!
Click to expand...

What were these same cells able to do before? Did you test the single cells for comparison when you first received your cells vs now?

Maybe time to test one year warranty with Victpower? :idea: But what does the one year warranty mean anyway??? :?
 
Nothing you can do about the cells but the real original 15AH celss were good for at least 10C, maybe more. Did you get "cut down tabs" or were yours full size tabs? 3.75C should be a "walk in the park" for the 20AH cells. There should be some heating but................
otherDoc
 
These cells are meant for cargo bike prototype which i am working on now. I haven't load tested them when i received them but cycled them twice at 20W for capacity check and kept them at 3.3V checking time to time. I got full tab cells, you can find my other thread/writeup about my purchase from victpower on battery section, lots of info there. My only thought now is they were very close to my lamp rig and there was some heat coming from the lamps. I mean you can get a tan just by standing close :D
Now i need to make couple copper bus block/connectors and test again. Good thing that those end bus blocks can be easily manufactured at home and does not require precision. For series connection between kits copper flat bar could be used but that's just in anybody's imaginations power :)
 
I have revised first post with all relevant info, photos, videos prices etc. Linked your photos as well, PM me if you want them removed. Created PayPal button for kits in stock.
 
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