AliExpress battery pack unboxing (for my eZuma project)

Batteries, Chargers, and Battery Management Systems.
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flippy   1 MW

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Re: AliExpress battery pack unboxing

Post by flippy » Jun 30 2019 8:49am

you can replace hall sensors with ones with a different scale, so usually its better to get a logarithmic then a linear one as you gain more control on the low end but lose on the higher end.
same goes with pots.
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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Jul 20 2019 11:22am

Here is how I mounted the AliExpress cable-operated throttle + hall throttle to my bike:
throttle _D8B5367.1200.jpg
throttle _D8B5367.1200.jpg (384.88 KiB) Viewed 1053 times
Still waiting on my controller to arrive... :(
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madin88   100 MW

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Re: AliExpress battery pack unboxing

Post by madin88 » Jul 21 2019 5:01am

MJSfoto1956 wrote:
Jul 20 2019 11:22am
Still waiting on my controller to arrive... :(
Why do you wait for a controller to arrive was there a problem with the actual one?
Or do you try something different?

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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Jul 21 2019 6:15am

madin88 wrote:
Jul 21 2019 5:01am
Why do you wait for a controller to arrive was there a problem with the actual one?
Or do you try something different?
Both.
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bigdeezs   100 µW

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Re: AliExpress battery pack unboxing

Post by bigdeezs » Jul 21 2019 4:44pm

What controller did you get?

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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Jul 21 2019 5:16pm

bigdeezs wrote:
Jul 21 2019 4:44pm
What controller did you get?
Let’s see how things play out...
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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Aug 06 2019 8:17pm

So the APT AE96600 controller that recently arrived from QSmotor is a keeper and both much more powerful as well as smoother running than my previous controller. Notwithstanding, I really like the PowerVelocity Bluetooth iPhone app with all its great functions -- so what do do? Well, I'm going to add some custom electronics to my mix so that I can get the PowerVelocity Bluetooth app to work in "read only" mode. Here's the wiring diagram. Just need to order the various bits and pieces.
Shunt detail.1280.jpg
Shunt detail.1280.jpg (410.64 KiB) Viewed 946 times
Note: the 1A glass fuses are an insurance policy to prevent any "accidental" 72V power from reaching anything else. For those wondering why I'm doing this: 72V will arc through common auto blade fuses, basically making a fire. Glass fuses like this won't arc.
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flippy   1 MW

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Re: AliExpress battery pack unboxing

Post by flippy » Aug 08 2019 5:40am

Would be even better if you used sillica filled (HRC) ones. Glass ones tend to be on the explody side when subjected to the comical power levels you can get with lipo.
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john61ct   10 MW

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Re: AliExpress battery pack unboxing

Post by john61ct » Aug 08 2019 10:38am

I've always used Class T, MRBF, or ANL type fuses for high currents.


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Re: AliExpress battery pack unboxing

Post by john61ct » Aug 08 2019 10:45am


MJSfoto1956 wrote: I really like the PowerVelocity Bluetooth iPhone app with all its great functions -- so what do do? Well, I'm going to add some custom electronics to my mix so that I can get the PowerVelocity Bluetooth app to work in "read only" mode. Here's the wiring diagram.
Be sure to check on the accuracy of the shunt reading before and after putting the fuses in the path, V drop is likely to have an amplified effect there?


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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Aug 08 2019 10:57am

john61ct wrote:
Aug 08 2019 10:45am
Be sure to check on the accuracy of the shunt reading before and after putting the fuses in the path, V drop is likely to have an amplified effect there?
This is news to me -- can you shed some more light here?

Thx
M
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fechter   100 GW

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Re: AliExpress battery pack unboxing

Post by fechter » Aug 08 2019 11:10am

MJSfoto1956 wrote:
Aug 08 2019 10:57am
john61ct wrote:
Aug 08 2019 10:45am
Be sure to check on the accuracy of the shunt reading before and after putting the fuses in the path, V drop is likely to have an amplified effect there?
This is news to me -- can you shed some more light here?

Thx
M
The current in the shunt sensing wires is very low, so the added resistance from fuses should not be a problem. Shunts are frequently located remotely from the meter and use pretty skinny wire (resistance). Still worth checking.
"One test is worth a thousand opinions"

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Re: AliExpress battery pack unboxing

Post by john61ct » Aug 08 2019 11:40am

The way shunts work, they are only as accurate as the voltage read by the "translation" gadget.

Many BMs now put those electronics attached right at the shunt itself, and then comm over the already "interpreted" current measurement, could even be wireless.

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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Aug 08 2019 1:08pm

So some of the parts came in last night. I happened to have a small piece of 1/4" HDPE lying around so mounting the two main components was easy: some slots for the two zip ties that hold the shunt in place and two M6 tapped threads to mount the fuses. Et voilá!
IMG_8661.jpg
IMG_8661.jpg (265.65 KiB) Viewed 891 times
The hope is to be able to wire it up this weekend and located it within the waterproof junction box mounted in the floorboard which you can see in the lower right in photo below. That will be a good place for the PV Bluetooth adapter.
IMG_8650.jpg
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999zip999   100 GW

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Re: AliExpress battery pack unboxing

Post by 999zip999 » Aug 08 2019 2:49pm

Sorry ? You had a P.V.
controller and it was noisy ? That QS controller is huge. And how many fets ?
Last edited by 999zip999 on Aug 08 2019 5:08pm, edited 1 time in total.

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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Aug 08 2019 3:29pm

999zip999 wrote:
Aug 08 2019 2:49pm
You had a P.V. controller and it was noisy ?
I never said it was noisy. I just said that this APT controller is smoother and more powerful. Noticeably so.
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fechter   100 GW

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Re: AliExpress battery pack unboxing

Post by fechter » Aug 08 2019 7:11pm

That controller looks like a beast. :thumb:

I'd be interested in learning more about that one. Do they have a web site?
"One test is worth a thousand opinions"

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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Aug 08 2019 7:14pm

fechter wrote:
Aug 08 2019 7:11pm
That controller looks like a beast. :thumb:

I'd be interested in learning more about that one. Do they have a web site?
LarsB did a thorough review of this AE96600 controller and came away disappointed. I, on the other hand, am totally happy with this controller for use with my scooter. Different strokes I guess. Here's a link: https://www.alibaba.com/product-detail/ ... 29295.html

P.S. it is a beast. It weighs 16.4lbs. Not recommended for an eBike. A better fit for an eMotorcycle or eScooter or even an eGolfCart.
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999zip999   100 GW

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Re: AliExpress battery pack unboxing

Post by 999zip999 » Aug 08 2019 7:39pm

Oh and how many fets ? On both ?

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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Aug 08 2019 7:47pm

999zip999 wrote:
Aug 08 2019 7:39pm
Oh and how many fets ? On both ?
No idea. Not interested in opening it up either. Ask LarsB. He knows this beast inside and out.
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Re: AliExpress battery pack unboxing

Post by 999zip999 » Aug 08 2019 10:58pm

The P.V. is 18fet and QS is 24fet. My guess. Good luck and keep up with your pack.

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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Aug 09 2019 6:50am

999zip999 wrote:
Aug 08 2019 10:58pm
The P.V. is 18fet and QS is 24fet. My guess. Good luck and keep up with your pack.
The PowerVelocity I had was 24fet as per their website: http://powervelocity.com/home/58-24f-15 ... mable.html

I might add: some 12fet controllers can handle more power than some 24fet controllers. The # of Mosfets is not necessarily the best indicator of potential.
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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Aug 09 2019 6:06pm

So the wiring came together in no time.
Next up: find a place within my crowded junction box for this puppy.
IMG_8670.jpg
IMG_8670.jpg (470.1 KiB) Viewed 800 times
Note: I plan on wrapping the exposed terminals with clear silicone tape to lessen any chance of chafing.
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flippy   1 MW

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Re: AliExpress battery pack unboxing

Post by flippy » Aug 10 2019 1:31am

And replace those fuses..... :roll:
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MJSfoto1956   10 kW

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Re: AliExpress battery pack unboxing

Post by MJSfoto1956 » Aug 10 2019 6:35am

flippy wrote:
Aug 10 2019 1:31am
And replace those fuses..... :roll:
Oh I like explody things! :P

P.S. On your advice I just ordered some ceramic fuses from China and will take a couple of weeks to get here.
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