Aller au contenu principal
Pour réparer ensemble - Je crée un compte

Informations sur la réparation et le diagnostic de la batterie externe multifonction FixHub, principale source d'alimentation et interface de commande de la gamme de produits FixHub d'iFixit. Commercialisée en octobre 2024.

Can the battery sustain 100W power for a a long time? Laptop charging

Hi !

I have no doubts that this battery can charge any smartphone but I would like to know if this powerbank can be used to charge a laptop that handles 100W for a sustained period of time (40 minutes for example) ?

Allmost all powerbank have a major flaw, they cannot sustain their maximal ouput power for more than a few minutes (generally 10 minutes) because of thermal throttling (of the controller, the mosfets the coils or the voltage regulators).

Thanks a lot and can't wait to order mine, seams perfect for remote small repairs !

Répondu ! Afficher la réponse J'ai le même problème

Cette question est-elle utile ?

Indice 0
7 commentaires

Hi @francoismaro

What is the make and model number of the powerbank and also the laptop?

Charging a battery with a 100W load capability depends on a few factors e.g. how depleted the battery is when charging is first started i.e. how long it will take to fully charge it and what voltage/current is required to charge it.

Trying to charge a100W battery with a 56Wh battery won't ever fully charge it

par

@jayeff - I think the question is on the new FixHub Portable Power Station which offers USB-C support for other devices as well. This really needs to be answered by the iFixit team @amber

par

@danj

Thanks for that

The battery supplied by ifixit shows max of 5.2A @ 10.8V so it will be a bit involved to determine how much current it can supply and at what voltage and for how long when charging a device. Also allowing for the fact of the powerbank battery voltage slowly dropping as it discharges.

Haven't fully read the info on the powerbank but presumably current adjustment (regulation option?) is not there allowing for a slower charge rate so as to not heat up the powerbank too quickly triggering protection

Not easy.

Cheers

par

@jayeff - That’s why it’s an iFixit team which needs to answer as I too have no idea what they have within the unit for logic, there are a few tricks but not at a sustained level.

par

@danj

Agreed.

Cheers

par

Voir 2 commentaires en plus

Ajouter un commentaire

1 Réponse

Solution retenue

Our battery pack has a peak discharge rate of ~5000mA, which provides a good balance of peak power (100W) with long battery life. However, running at peak power output generates a lot of heat, and the Power Station, like the other battery packs that you've seen, will hit thermal limits after running at 100W output for ~20 minutes. While frustrating, this is a technological limit of Li-ion batteries, and the throttling is there to prevent overheating of the battery packs, which can cause "thermal runaway" events.

If you wanted a battery pack capable of running at 100W for 40 minutes straight, you'd want something that has a 1C (or lower) discharge rate while supplying 100W. This is going to depend quite a bit on the structure of the battery bank (how many cells in parallel vs series) and the internal circuitry of the USB device, since most components used in power banks aren't rated for voltages higher than ~20V. There are newer battery banks that can output 36 and 48V over USB, but they're considerably larger and more expensive than our Power Station.

Cette réponse est-elle utile ?

Indice 6
Ajouter un commentaire

Ajouter une réponse

François Maro sera éternellement reconnaissant.
Nombre de vues :

Dernières 24 heures : 0

7 derniers jours : 5

30 derniers jours : 23

Total : 389