OVERCLOCKING an ANCHEER 20 inch folding ebike (Model AM001908 36V20" 250W)

Get all your technical information about electric bikes here.
User avatar
Matador   10 kW

10 kW
Posts: 920
Joined: Jun 29 2016 10:00pm

Re: OVERCLOCKING an ANCHEER 20 inch folding ebike (Model AM001908 36V20" 250W)

Post by Matador » Jul 30 2020 6:16am

Just got my Ancheer eBike out today. I had battery stored at 38.1V since february. Now charging it for a ride right around lunch time.
But it got me wondering... The original battery, does the "BMS" actually balances cells....

So I remembered I had taken pictures in the past of the battery internals:
5 - IMG_20180907_222034398_HDR.jpg
5 - IMG_20180907_222034398_HDR.jpg (338.57 KiB) Viewed 42 times
8 - IMG_20180907_222140566_HDR.jpg
8 - IMG_20180907_222140566_HDR.jpg (265.3 KiB) Viewed 42 times
It's written "SP-R13-068-A01-M10SY-8185/1709080380" on mine.

From what I read, the "BMS" from the original "in frame" battery is from "Shenzen SuperPower Technology, Co. LTD",
Model: SP-R13-068-A01-M10SY

So I found pictures on a russian websites that look like the same thing (though labeled SP-R13-068-A01-M10SY)
1.JPG
1.JPG (56.46 KiB) Viewed 42 times
2.JPG
2.JPG (35.41 KiB) Viewed 42 times
3.JPG
3.JPG (30 KiB) Viewed 42 times
4.JPG
4.JPG (24.63 KiB) Viewed 42 times
The website ( https://el-vel.com.ua/p843133566-bms-36v-10s.html ), onced google translated, gives the following specs:
spec.JPG
spec.JPG (59.57 KiB) Viewed 40 times
I could not find the Original Specification Datasheet from the BMS manufacturer, but I find something really close, which is the 13S (48V) version of this "BMS" called model SP-R13-068-A03.1 : http://www.sz-supower.com.cn/en/products_1.html
Here is the full PDF datasheet of the 13S version of the SP-R13-068-A03.1 "BMS" (could not find the 10S version):
SP-R13-068-A03.1.pdf
(393.71 KiB) Downloaded 3 times
And here are some more pics of this 13S version, which is exactely the same dimensions, excep just 3mm more width:
1.jpg
1.jpg (45.15 KiB) Viewed 38 times
2.jpg
2.jpg (64.51 KiB) Viewed 38 times
3.png
3.png (169.61 KiB) Viewed 38 times
4.JPG
4.JPG (32.09 KiB) Viewed 38 times
Bottom line is, from what I can read from the "BMS datasheet", this "BMS" is more just a protective PCB circuit (protects against overcharge and undercharge), but it does NOT individually balance cells. So once in a while (every once a year or so) it would be advisable to balance each 4P cell row manually, otherwise when only one of the 4P string out of the 10S 4P strings get out of whak in voltage relative to the other remaining 9 4P groups, either the low voltage cutoff voltage or high voltage cuttof would kick in when discharging or charging respectively, resulting in a less then optimal overall battery capacity in both cases...
Just thought it would be worth noting... Not a real balancing BMS, just a over/undercharge protective circuit here.

Matador

User avatar
Matador   10 kW

10 kW
Posts: 920
Joined: Jun 29 2016 10:00pm

Re: OVERCLOCKING an ANCHEER 20 inch folding ebike (Model AM001908 36V20" 250W)

Post by Matador » Jul 30 2020 12:34pm

Ah that ride felt goood ! 22.0 km (36V 8.0Ah battery) --> From 41.7V to 37.3 V (resting voltage). LVC at 31.5V... Did peddle a bunch though (between PAS High, PAS med and a bit of PAS Low... Last 5 km on throttle only).

Matador

docw009   100 kW

100 kW
Posts: 1305
Joined: Aug 02 2015 7:43am
Location: Chicago area suburbs.

Re: OVERCLOCKING an ANCHEER 20 inch folding ebike (Model AM001908 36V20" 250W)

Post by docw009 » Aug 01 2020 8:38pm

Looking at the 13S spec, you can see that the whole balance section on the specs is blank. Have come to the conclusion that it is unsual for a inexpensive battery to have a balance BMS.

I have noticed that on batteries where I replaced the BMS with balancing models, that the battery will take about 40ma after it stops charging. That's your typical balance drain.,

Post Reply