The EV Tech 37V LiPoly pack review and discussion

[TylerDurden]

Dude. You might get more respect, if ya didn't bite everybody's ankles.

Here's some discharge data from the pdf:

 

[EbikeMaui]

You posted A-Energy as the battery cell manufacture of Dougs pack that he sent Reid ? Where are the REAL battery manufactures specs? If getting to the truth is a crime here lock me up . LOL

 

[TylerDurden]

You posted A-Energy as the battery cell manufacture of Dougs pack that he sent Reid ? Where are the REAL battery manufactures specs? If getting to the truth is a crime here lock me up . LOL

From page 2:

Randy,
Here are the published specs.
here are the specs for the pack
I can't read the data or see the pictures of him shorting a cell to flatline, because the PDF won't open on this Vista computer.

Randy, I would not $hit you...

...yer my favorite t*rd!

:lol:

 

[Reid Welch]

Thanks Tyler. So the maker of the cells seems to be at
http://www.aeenergy.com.hk


http://www.aeenergy.com.hk/aboutus/set.html


screenshot

 

[TylerDurden]

Randy has a very important point: It is hard to say who really makes the pack without seeing the cells... or the BMS.

The BMS might be supplied by these guys (google can translate for you, search: TYB10SJ) But that is going by the pix knoxie supplied.

http://www.battery.com.cn/products/product_detail_27724.html

The more I see it, the more I don't like this "welded mystery-box" kind of stuff... even your supplier can't really know what's inside.


:?

 

[Reid Welch]

Hmmmm...so it would be nice to know who assembles the pack and all that. What would that mean to me, though?

I can and will photograph the BMS in this unit.
It should match Knoxie's example.

We do know the pack has worked well for many people for this past year and a half.
There have been no negative incidents.

Regarding the welded box, why is this a standard practice?
Does the assembler know something we don't know?
Is it to ensure against sheet metal screws?
Is it to prevent meddling by the end users and battery repairmen?
Is it to make a tell-tale of tampering in the event of warranty claim?
Is it to ensure against sheet metal screws?

These are rhetorical questions which we raise,
we of zero experience , 100% ignorance in the art of assembling, vending and warranting handmade LiPo packs.

__________________________________


I have just looked at my digicam's battery. Sealed, dammit.
Same with my drill pack. It's all in plastic!
They're branded by big-name companies, at least,
so I don't worry about their integrity.

__________________________________

I see a Chinese language discussion forum found from your link, Tyler.
It may be interesting to muddle through with the translator.

 

[Reid Welch]

 

[TylerDurden]

Look familiar?...

http://www.goldenmotor.com/batterypack.htm


Me confuzed.
:?

 

[BiGH]

36V/50Ah (13.5Kg) x 2 + 5304 = mmmmmmmmmmmm - it might kill you
48V/50Ah (13.5Kg) x 2 + 5304 = mmmmmmmmmmmm - its trying to kill you





so if the rubber epoxy is used to keep out water, has anyone modded their controller to be filled with the stuff?

edit: sorry for all the newbie questions - maybe the forum should have a "newbie questions area"

 

[Herr Aflaschcindernose]

Look familiar?...

(pics stripped, see above)


http://www.goldenmotor.com/batterypack.htm


Me confuzed.
:?

Mein Gott! How you do fine der messing tings!
I tell Rid to look. He iss easy impressed. He cann't find effen his kar keys.

Dis ist pig another vrom der same poke
mitt keys do learn uff more.

H A

 

[Reid Welch]

Look familiar?...

http://www.goldenmotor.com/batterypack.htm


Me confuzed.
:?

You answered a question by those two pictures, Tyler:

The answer to the question, why does my pack make a shifting-weight sound when tipped end to end:

-The pack is that golden wrapped rectangle
-It slips into the aluminum box
-The shake is the fit of the pack to the inside of the box.

Now I know what I'll use to fully immobilize the pack:
Some squirts of Perfect Glue into the grommet holes, most likely.
At least I know now that the shaking is not as malignant as previously feared:
it's not the raw cells, pouches exposed. Nothing like that.
But it will be fixed so it will be right.

===
Thanks!

 

[EbikeMaui]

Hmmmm...so it would be nice to know who assembles the pack and all that. What would that mean to me, though?

I can and will photograph the BMS in this unit.
It should match Knoxie's example.

We do know the pack has worked well for many people for this past year and a half.
There have been no negative incidents.

Regarding the welded box, why is this a standard practice?
Does the assembler know something we don't know?
Is it to ensure against sheet metal screws?
Is it to prevent meddling by the end users and battery repairmen?
Is it to make a tell-tale of tampering in the event of warranty claim?
Is it to ensure against sheet metal screws?

These are rhetorical questions which we raise,
we of zero experience , 100% ignorance in the art of assembling, vending and warranting handmade LiPo packs.

__________________________________


I have just looked at my digicam's battery. Sealed, dammit.
Same with my drill pack. It's all in plastic!
They're branded by big-name companies, at least,
so I don't worry about their integrity. Some thoughts on this.

 

[EbikeMaui]

Having used the same or simular battery to the end of it;s life IMO very THIN boxes with WEAK SEAMS filled with a fire retardent wax lets the user know when the pack and components are failing.I gave the manufacture some hints on how to improve these packs.You now can have the same opertunity.
1. SEAL the BMS and isolate the HEAT from the cells,and also so it can not spark when the cells DO vent at the end of battery cell and BMS life cycle which ever comes first..
2 A stronger case would be NICE! but in the manufactures view it would cost more and would not let venting cells expand! to let the user know and not explode.
3. Higher quality BMS !! , Charger, Ballancer!!!!!! and more robust cell pouches packed in larger Ah cells in series without stacking up 3 in parallel.Any one of 30 cells! can be bad and ruin a pack.
QUALITY CONTROLL!!!!!!!! replaceable cells right now are only a dream.
End of Review until a few months of cycling or the pack oozing melted wax out of the split seems after a few hard rides ? Didn't Richard Papa test the same pack?