10 pin Li-Po battery connector experiment

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ccs_hello
Posts: 439
Joined: Sat Oct 13, 2018 9:16 pm

Sat Jan 19, 2019 3:07 pm

When I used my test configuration (no battery gauge IC thus no I2C connection), windows also showed battery percentage and time left.
I then used "BatteryInfoView" application to check battery status. It appears that somehow it measures (1) battery voltage (as LP Alpha sees it and battery discharge rate, in mWh.) The battery pack is recognized as "Intel Battery SR 1" (I think it's just a generic name for virtual/estimate.) I think if I ran thru several cycle, it may become more accurate.

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LittleDuckAlex
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Joined: Tue Jan 08, 2019 6:10 pm

Sun Jan 20, 2019 12:55 pm

Ah, fair enough

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MinimalSkill
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Joined: Thu Jan 31, 2019 5:19 pm

Thu Jan 31, 2019 5:28 pm

From my research I believe the connector to be a JST SH 10 pin 1.00mm receptacle... I will confirm these dimensions to be correct soon. If this is correct, a SHR-10V-S-B connector should work.

https://www.digikey.com/products/en?mpa ... -S-B&v=455

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ccs_hello
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Thu Jan 31, 2019 7:31 pm

The SH series is still too thick (2.1mm).
In my estimation, the connector thickness is around 1.6mm approx.

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mcbabysan
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Joined: Fri Feb 01, 2019 10:57 am

Fri Feb 01, 2019 2:18 pm

Can someone please enlighten me as to the various connector types required for the LPA. i need the 2-pin SW and the 4-pin DC. My plan was to use a drone power distribution board to regulate a constant 12v output to the LPA. Some even have built in battery monitoring and they usually cost less than £10. Also means i can power the led light in my power button seperately.

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ccs_hello
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Fri Feb 01, 2019 2:47 pm

mcbabysan wrote:
Fri Feb 01, 2019 2:18 pm
Can someone please enlighten me as to the various connector types required for the LPA. i need the 2-pin SW and the 4-pin DC. My plan was to use a drone power distribution board to regulate a constant 12v output to the LPA. Some even have built in battery monitoring and they usually cost less than £10. Also means i can power the led light in my power button seperately.
See http://www.lattepanda.com/topic-f5t17086.html

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Gunner
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Joined: Thu Feb 14, 2019 12:52 pm

Thu Feb 14, 2019 1:07 pm

Is there any chance LP Alpha will work with an 17Volt (measured 17volt instead 14.4 as written on amazon) V-Mount Battery like this:
https://www.amazon.de/Patona-Premium-66 ... nt+battery
Connected over JST 2.0 PH 4-Pin Connector from Power-Tap output from Battery.
Would be the perfect solution for me.

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ccs_hello
Posts: 439
Joined: Sat Oct 13, 2018 9:16 pm

Fri Feb 15, 2019 12:30 am

@ Gunner
Indeed the question need to be answered by LattePanda,
Similar questions had been asked before (what's the max. supply voltage that LP Alpha can handle?)
The answer I have seen is the "15V" answer. I think it can do better. The supplied USB-C is providing at least 15.4V and it is fine. So a "more qulified" answer would be helpful.

BTW, that AMZ battery you are referring to is a 4S Li-Po pack. In fully charged state, the max. will be 16.8V, nominal: 14.4 (or 14.8V), and its BMS under-voltage protection probably will shut it down around 11-12V range.

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LattePanda
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Mon Feb 18, 2019 8:27 am

@Gunner, we still recommend to choose power source less than 15volts. ;) Thanks.
Enjoy Tinkering with LattePanda ! :lol:

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ccs_hello
Posts: 439
Joined: Sat Oct 13, 2018 9:16 pm

Sun Mar 03, 2019 10:39 pm

Some asked me about how Windows 10 reports the battery status (charging level, power left, etc.) when using my experimental 2S Li-Ion battery "without the fuel gauge IC" over that 10-pin connector.
I retested my configuration and have to report that "it is not accurate nor trustworthy at all".
Several reasons and the main one is "mine cannot report the current flow thru the battery pack", thus only voltage level (on the LPA side, not the battery pack terminal side) is measured.
So it depends on the battery quality, battery discharge cycle times (battery age), specific battery's internal design, and the goofy/unpredictability of Windows charging/discharging estimation algorithm, the reported value can vary a lot.

Yet still an important message to take in: the battery charging circuit (CC then CV) still works. So in a way, the battery pack is doing its things.
Taping a sheet of paper on Windows' battery status reporting area probably helps more than having a status report at all.

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