April 07, 2020, 10:38:22 pm

News:

Have you visited the Allwinner Chipset wiki? - http://linux-sunxi.org/


Cubietruck battery charging voltage too much

Started by HahnRobin, April 03, 2016, 06:26:31 am

Previous topic - Next topic

HahnRobin

Hi!

Last week I bought a Li-ion (3.7V 2200mAh) battery for my Cubietruck and I connected the battery to it. I changed the capacity in the .bin file but the battery doesn't wanted to charge. It's has a protection circuit and it's always shutted it off. So I measured the battery connector on my Cubietruck and it was 5.02 V. As far as I know it's needed to be max 4.2V. I checked the voltages in the .bin and I tried to reinstall the OS too but it's doesn't helped...

Have someone any idea what makes this?

Thanks:
Robin Hahn
(Sorry for my English)

slovenia

Are you sure you attach battery to battery connector and not to SATA power?

Wrote on mobile phone

Debian and Ubuntu images with kernel 3.4.110, 4.3.3, 4.4
http://www.armbian.com

HahnRobin

Yes, I'm sure. I tried it with other power supplies (normally I use a PSP charger (5V 2A)) for example: iPhone charger, simple 5V 2A charger, 5V 1,5A charger, but it's doesn't matter. Sometimes the voltage that I measured on the battery connector goes up to 5,2V , 5,6V even 6V! The OS (I use armbian with legacy kernel) shows wrong informations about the battery like 10000mAh the current and 0 volt or 6000mAh current and 4504000 voltage(or more) (I measured the battery and it's doesn't go above 4,25 because the protection circuit).

Thanks for your answer!

Robin Hahn

slovenia

Failed AXP chip which take care of this is also an real option.

Wrote on mobile phone

Debian and Ubuntu images with kernel 3.4.110, 4.3.3, 4.4
http://www.armbian.com

phelum

Quote from: HahnRobin on April 03, 2016, 06:26:31 am
Hi!

Last week I bought a Li-ion (3.7V 2200mAh) battery for my Cubietruck and I connected the battery to it. I changed the capacity in the .bin file but the battery doesn't wanted to charge. It's has a protection circuit and it's always shutted it off. So I measured the battery connector on my Cubietruck and it was 5.02 V. As far as I know it's needed to be max 4.2V. I checked the voltages in the .bin and I tried to reinstall the OS too but it's doesn't helped...

Hi,

Have you checked the settings in /sys/class/power_supply/battery (e.g. voltage_min, voltage_max, voltage_now) ?  If voltage_now matches your actual measured voltage maybe you can play with some of the power_supply settings and see if it helps.

Cheers,
Steven