1792 réponses à ce sujet

[Mike118]

We tested a lot of UPS board, and the best board we tried and that we currently use on our robot is this one : https://m.fr.dhgate....our|m|2|#pd-011
The problem of this board is that we should remove some component to make it works perfectly (at least R5, but better is to also remove U3 R4 R23 R24 R26 R27 and C12 ) ,and add a big capacitor (around 2000µF 3000µF ) on the 5V output. Plus the USB connector could have been in a better spot or at least a connector to put our own input connector would have been great...
It seems that this board is now available again, but we had a lot of troubles to find it some month ago ...
So we want to dev our own ups board!

[Deleted_User]

Je trouve des super capacitor 5.5v mais en 0.1F ça va faire trop non ? Elles sont toute petites en taille

[Mike118]

Be carefull with super cap, they may have big capacitance but may not deliver enough current. I had the problem myself ... Standard chemical capacitor are better for that.

[Deleted_User]

Ok thanks

[Mike118]

Minimum requested features for the UPS Board :
=> Powerful step up with smooth 5V 3A output to power the raspberry pi
=> Charging IC to charge 1S batterie charging at 2A minimum
=> Fuel gauge IC to mesure voltage
=> Being able to charge while powering the PI.

Bonus :
=> Led to display voltage state
=> Connector available for custom input
=> Some servomotor connector type : "GND VCC PIGPIO"

[Deleted_User]

EUR 22,90 | Raspberry Pi 4 UPS HAT 2 avec type-c, Module de carte d'extension de batterie au Lithium (sans batterie) pour Raspberry Pi 4 modèle B/3B +/3B
https://a.aliexpress.com/5gHC70wAP
I think I will try thisone. It's seem's to be not so Bad...
EUR 21,98 | UGEEK UPS 2 chapeau avec batterie pour Raspberry 4B/3B +/3B | support 3A chargeur/sortie de courant | conforme à la Charge rapide QC3 <5 V/3A>
https://a.aliexpress.com/d5LEyxAOJ

[Deleted_User]

NONNON
risque d'incendie il y a trio d'isio4 dessus

Bon j'ai laissé tombé j'ai pris un bms et un bec

[Deleted_User]

Salut tout le monde, finalement j'ai pris la carte j'aime le risque !

On verra bien, je surveillerai

[Mike118]

Si tu es satisfait de cette carte et que tu souhaites la garder sur ton robot on ajoutera éventuellement le support de la jauge de batterie qui est dessus.

[Deleted_User]

Ça y est pas déjà ?
Elle va prendre feu
@Mike118 volontiers

[Mike118]

First step : I2C battery fuel gauge in a DIP6 format

[Snyp54]

[Deleted_User]

Vite ça presse !

[Serveurperso]

Cool bon boulot jojo

[Deleted_User]

Test of this UPS. A lot of undervoltage detected for the moment. I will add a Big capacitor

[Deleted_User]

Oui un gros condo
C'est commandé déjà j'ai pris du 3300uF 6,3V
j'en mettrai deux au pire lol
Il va s'appeller CapaciBot le robot lol
Met un 6800
ouai ben x2 de 3300 ca fera 6600
Plus besoin de batterie tellement va y avoir de condensateur

J'ai bcp moins de message aujourd'hui, avec le condo ca ira je pense
et pour l'instant elle a pas pris feu
Ouf
Ça arrive

jaloux
elle a tourné toute la nuit en charge, même pas peur

[firened]

@Deleted User i assume it gets very hot when charging?
i see it charges with 2A default and that's quite a lot already.
but it can be changed to 1A pretty easily

[Deleted_User]

I will let it on 2A. I've no hoverheating during charge

[Mike118]

this thing said it can charge up to 3A ... https://fr.aliexpres...3032500223.html I hope that it works as expected ...

[firened]

3A! yes I'm curious too how well they work.
those charger boards get the hottest when the battery is low. because then they burn off the voltage from 5V to battery voltage (e.g. 3.5V) and generate the most heat.
so 2A on the UPS could work
@Mike118 is the 2R2 component a coil??
I can't tell! if it is a coil then it's a DCDC charger board which do not burn of excessive voltage! i will use this board in my future projects too!