LattePanda Alpha 864 3D Model and Pinout

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

Fri Feb 08, 2019 8:43 pm

It's in the 0.3W to 0.5W range.

Search "Cube i7 battery" from Aliexpress.

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getzemani63
Posts: 4
Joined: Wed Jan 30, 2019 4:34 am

Sat Feb 09, 2019 2:49 am

so I just need to buy this battery

https://es.aliexpress.com/item/7-4-V-ba ... 39.99734.0

do I need to connect it through the 10 pin battery port of the alpha? just like that?

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

Sat Feb 09, 2019 5:35 am

It seems to be right.
When receive the battery pack, please check the pin out first before plugging it in.

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zzarr
Posts: 9
Joined: Fri Feb 08, 2019 7:32 am

Sun Feb 10, 2019 10:54 am

Hello again!

Thanks for all the answers!

Is there a battery with 10-11 Ah capacity (7.4V) that fits?
(I have been searching for a battery but not found.)

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

Sun Feb 10, 2019 8:54 pm

No. IMHO We are simply taking advantages of Alpha's cousins: small-screen ultra-compact Cube i7, i9, Mix, etc.
and their mass-production experiences (and spare parts.)

On the other hand, Cube laptop/tablet are designed for light weight and portability.
Larger battery pack will make Cube family unattractive.
70 - 90Wh battery packs are typically seen in large screen business laptops.

I.e., without sales in large quantity, there will be no commercial success.

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zzarr
Posts: 9
Joined: Fri Feb 08, 2019 7:32 am

Mon Feb 11, 2019 7:43 am

Would it be possible to use 2 batteries?

(e.g. 2x5Ah, 7.4V)

Or is there a compatible charge/discharge/cutoff board that takes 2 3.7V cells?

Best Regards

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

Mon Feb 11, 2019 2:09 pm

Just buy two pieces of 3.7V 4500mAh Li-Po batteries and parallel it to existing batteries.
I.e., turning the battery pack from 2S 1P into 2S 2P arrangement. (Charging time probably will be doubled and usable time will too.)

WARNING: you have to know underlying technologies and safe handling rules first! Lithium-Poly batteries are dangerous if not handled carefully!
For example, in the process of "paralleling" the batteries, you have to make sure the voltage level is about equal first or risking fire hazard!
All risks are on your own.

On the other hand, the fuel gauge IC BQ3060's internal settings will not be changed, so it will not know the battery capacity has increased.
<-- at this point no one reported the "BatteryInfoView" result of this "official" battery pack (i.e., whether or not the EC is reading BQ3060 thru I2C)

P.S. programming BQ3060 is rather involved (for factory engineers)

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zzarr
Posts: 9
Joined: Fri Feb 08, 2019 7:32 am

Tue Feb 12, 2019 7:55 am

Can I charge lipo cells in parallel without any problem? (Don't I need a balanced charger?)

Is there a way to connect another BQ3060? (Through GPIO or any other way)

Best Regards

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

Tue Feb 12, 2019 2:02 pm

re: Can I charge lipo cells in parallel without any problem? (Don't I need a balanced charger?)
Yes, the LP Alpha's charging circuit will still charge higher capacity pack. Just takes longer to get it fully charged.

The "factory" battery pack does not have battery balancer built-in. Many battery packs mfg do that because
(1) the batteries came out from the same batch thus they can stay "approximately balanced" for a long time and
(2) if losing balance, the consumers will buy another pack (nice! for them)

re: Is there a way to connect another BQ3060? (Through GPIO or any other way)
NO!
That's not how it works.
OS level power management -- > ACPI -- > EC -- > I2C -- > fuel gauge IC

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zzarr
Posts: 9
Joined: Fri Feb 08, 2019 7:32 am

Wed Feb 13, 2019 7:39 am

Thanks for explaining that ccs_hello!

Can I build my own battery pack with desired cells? (What except for the cells would I need?)

Best Regards

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