Wireless charger for laptop? - Page 1
Forum section: electronics / projects

author: sticky
author_rank: Newbie
timestamp: February 01, 2018, 08:18:51 pm
content: Hi,this is my first post so please don't beat me to death with my own shoe;)Long story short I came up with idea of wireless charger for laptop. Or big wireless charger powerful enough to charge laptop. I have plenty of cables on my desk and I though that it would be really cool if I could get rid with at least some of them. Like, let's say, my Dell charger laptop (19V 4.62A, 90W), charger for my phone (already have one, but could get rid with it too if I have truly wireless solution). My computer screen use charger with 19V 2.37A. On my desk I also have base for my wireless headphones that's constantly plugged in, my watch charger and few other bits that need cables. I have seen kits for phone to "make any phone wireless" like this one:https://www.aliexpress.com/item/QI-Wireless-Charging-Charger-Receiver-Pad-Coil-for-iphone-6-4-7/32225790024.html. Basically you plug this in into charging dock and voila - it will charge wirelessly. So i thought about same sort of solution for laptop and screen and anything else that I can came up with.And here starts my problem: I have no idea if that idea is practical. I looked up for wireless chargers and I found this:http://www.huagontech.com/product/high-power-wireless-charger-module-20w-output.html- it looks big and impractical. I would be ok with putting extra stuff on charging pad, but receiver with all this electronics makes not much sense. I know that charging phone is one thing, and wirelessly charging/keep powered on few devices at the same time is different kind of story.Could anyone more expereinced than noob like me judge if it is worth bothering with? is it good idea or total scrap? Have a good day/evening and I'm hoping for at least one anwer:)

author: viperidae
author_rank: Frequent Contributor
timestamp: February 02, 2018, 04:19:12 am
content: Don't forget to design a cooling system too. Qi peaks at 65% efficiency in perfect conditions. To deliver 90 watts to charge your laptop, you'll need to dissipate 50 to 135w, assuming 40 to 65% conversion.

author: amyk
author_rank: Super Contributor
timestamp: February 02, 2018, 12:02:54 pm
content: If you're fine with waiting many many hours for a charge (while the laptop is completely off --- if it's on, it would not charge at all), then even a few watts would be enough...

author: Naguissa
author_rank: Regular Contributor
timestamp: February 02, 2018, 10:15:12 pm
content: May be viable to a low power ultrabook, not to a 90W laptop.Enviado desde mi Jolla mediante Tapatalk

author: stj
author_rank: Super Contributor
timestamp: February 02, 2018, 11:33:11 pm
content: unless you intend to put the laptop upside-down to charge, it cant work.even with the massive losses, the distance between coils can only just be done through the lid - just.go watch big clive and diode gone wild's technical review of those bits of junk marketed as a usefull product.they are about as usefull as a sticky plastic octopus you throw at a wall and it slowly walks down - and unfortunatly will probably be just as popular.untill they set some batteries on fire!!