Battery

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User avatar
Delphium
Posts: 21
Joined: Mon Apr 18, 2016 3:20 pm

Tue Apr 26, 2016 12:50 pm

I have used a battery USB charger device to power my LP for long periods of time (few hours) without issues.
The battery pack I use is a Lithium-Ion rather Lithium-Polymer.

Having worked with Lithium-Polymer batteries before, they should work just fine so long as they are connected to the LP via a 5V@2A regulator (for example a pair of Texas Instruments UA7805 wired in parallel will provide 5V at up to 3A, enough to drive the LP and most attached devices.

The Ti-UA7805 requires a minimum working voltage of 7V.

Of cause a single healthy Lithium-Polymer battery typically outputs (on average) at 3.7V (4.2V max), thus you need to wire up 2 cells in series to get to 7.4V (8.4V max) combined, you could use a 3rd cell to bring the total input power up to 11.1V (12.6V max).

The TI-UA7805 has a max input voltage of 25V.

One can then use this 5V to power the LP via its micro USB power input connection.

Note other brands/makes/models of voltage regulators are available, I picked Texas Instruments for their reputation, availability and documentation.

WARNING
Note that voltage regulators tend to dissipate quite a bit of heat so try to design your projects with as much distance as possible between the batteries and the regulators to avoid any potential fire hazards!

User avatar
LattePanda
Site Admin
Posts: 2761
Joined: Wed Jan 20, 2016 9:09 am

Tue Apr 26, 2016 6:44 pm

soufyen wrote:Is this for RTC or lipo bat"look at attachements"
That's right. It's a hidden function. And we didn't provide tutorial and support for this yet. But it's exactly the RTC power connector instead of the system power source.
Enjoy Tinkering with LattePanda ! :lol:

User avatar
Boring
Posts: 88
Joined: Sat Apr 16, 2016 7:14 pm

Fri Jul 29, 2016 9:39 am

I Have s70C rev 1.1 there is no RTC battery connector on this board :(

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LattePanda
Site Admin
Posts: 2761
Joined: Wed Jan 20, 2016 9:09 am

Wed Aug 03, 2016 11:17 am

Delphium wrote:I have used a battery USB charger device to power my LP for long periods of time (few hours) without issues.
The battery pack I use is a Lithium-Ion rather Lithium-Polymer.

Having worked with Lithium-Polymer batteries before, they should work just fine so long as they are connected to the LP via a 5V@2A regulator (for example a pair of Texas Instruments UA7805 wired in parallel will provide 5V at up to 3A, enough to drive the LP and most attached devices.

The Ti-UA7805 requires a minimum working voltage of 7V.

Of cause a single healthy Lithium-Polymer battery typically outputs (on average) at 3.7V (4.2V max), thus you need to wire up 2 cells in series to get to 7.4V (8.4V max) combined, you could use a 3rd cell to bring the total input power up to 11.1V (12.6V max).

The TI-UA7805 has a max input voltage of 25V.

One can then use this 5V to power the LP via its micro USB power input connection.

Note other brands/makes/models of voltage regulators are available, I picked Texas Instruments for their reputation, availability and documentation.

WARNING
Note that voltage regulators tend to dissipate quite a bit of heat so try to design your projects with as much distance as possible between the batteries and the regulators to avoid any potential fire hazards!

Here is one of ours running using these components:

http://www.dfrobot.com/index.php?route= ... 6G99TV1Zfc

http://www.dfrobot.com/index.php?route= ... 6HSPjV1Zfc

http://www.dfrobot.com/index.php?route= ... 6HSjzV1Zfc

power delivered via CN2 headers (be very careful of polarity!!)
IMG_0335.JPG
IMG_0335.JPG (1.9 MiB) Viewed 11204 times
Enjoy Tinkering with LattePanda ! :lol:

User avatar
thanos_37
Posts: 20
Joined: Fri Aug 12, 2016 7:54 am

Wed Aug 31, 2016 7:12 pm

Hello forum,

i want to use to my project a 6V 4,5A Hlead acid battery. The question is if i can power my LP with that battery ?
RoboticsArt

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LazyBunny
Posts: 65
Joined: Mon Oct 24, 2016 10:38 pm
Location: USA
Contact:

Mon Oct 24, 2016 10:53 pm

LattePanda wrote:
soufyen wrote:Is this for RTC or lipo bat"look at attachements"
That's right. It's a hidden function. And we didn't provide tutorial and support for this yet. But it's exactly the RTC power connector instead of the system power source.
I'm new here, and haven't bought an LP yet. the deal breaker for me is RTC support with windows 10. It's an absolute must have.
I intend to get the LP 4GB/64GB version, but I need to know if it has these solder pads on it. I can't find high resolution pictures of the boards anywhere.
And if so, the polarity of the pads and the voltage needed, 3v coin cell?. I can do SMD and 0.5mm pitch soldering so putting an RTC battery connector on this thing would be super easy.
I even have a few RTC battery connectors already from other projects. I just need to know if the 4gb/64gb version has the pads, the polarity of the pads, and the voltage of the coin cell.
My Gameboy: http://imgur.com/a/lhY1x
My SBC Joystick: http://imgur.com/a/vtc5C
My Rockin' Dreamcast: http://imgur.com/a/kI50p
I'm Kiera, the Laziest Bunny in all of Bunny Town.

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UtahMadMike
Posts: 4
Joined: Fri Feb 24, 2017 9:02 pm

Fri Feb 24, 2017 9:17 pm

The company I work for had a similar dilemma, so we designed a battery/power pack that can also alert the SBC when the battery is low. It also monitors the SBC "heartbeat" and more. . .

So far it works great. I need to increase the Amps for the LP. Anyone interested in obtaining a POC version?

User avatar
LazyBunny
Posts: 65
Joined: Mon Oct 24, 2016 10:38 pm
Location: USA
Contact:

Sat Feb 25, 2017 7:50 pm

soufyen wrote:Is this for RTC or lipo bat"look at attachements"
Thats for a Real time clock battery.
See: http://www.lattepanda.com/forum/viewtopic.php?f=6&t=987
My Gameboy: http://imgur.com/a/lhY1x
My SBC Joystick: http://imgur.com/a/vtc5C
My Rockin' Dreamcast: http://imgur.com/a/kI50p
I'm Kiera, the Laziest Bunny in all of Bunny Town.

User avatar
billymac
Posts: 7
Joined: Thu Mar 09, 2017 12:43 pm

Thu Mar 09, 2017 2:54 pm

So will it run on 4.8v laptop cells?
Even if it will, I assume it wouldn't last long as the voltage starts to drop
May need to use 2 in series (9.v) and regulate it down.
Or does the panda have built in regulation so you could use 9.6 directly?

User avatar
ED209
Posts: 222
Joined: Tue Apr 19, 2016 3:31 pm

Wed Mar 15, 2017 5:34 pm

billymac wrote:So will it run on 4.8v laptop cells?
Even if it will, I assume it wouldn't last long as the voltage starts to drop
May need to use 2 in series (9.v) and regulate it down.
Or does the panda have built in regulation so you could use 9.6 directly?
I don't think panda have built in regulation for using 9.6...
I just replied another post about the battery solution for panda.

Check this:
viewtopic.php?f=5&t=1106&p=4915#p4915

Hope it's helpful. ;)

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