General > General Technical Chat
USB-C charging law in the EU.
AVGresponding:
--- Quote from: Siwastaja on November 12, 2023, 06:42:59 pm ---SELV limit in EU is much higher than that, 19V just happens to be convenient voltage for laptops charging their 4s li-ion packs (16.8V max charge voltage) using a buck converter with enough leeway for voltage regulation. You also see 18V and 20V power supplies and they usually all work interchargeably as long as the connector is right and the thing doesn't use some more complicated handshake stuff.
--- End quote ---
--- Quote from: mikeselectricstuff on November 13, 2023, 10:45:50 am ---Laptops have used around 19V for at least a couple of decades, since they have been using lithium cells
The only safety classification is SELV, which from memory is below 60VDC.
--- End quote ---
It's 50VAC or 120VDC, with exceptions. This is derated to 25VAC and 60VDC if basic protection (insulation or barriers/enclosures) is omitted, and further derated to 12VAC and 30VDC if direct contact with water is expected. The DCV ratings are for ripple free supplies; if you have a non-smoothed one you'd have to ensure the peaks didn't exceed the mentioned limits to comply.
tooki:
--- Quote from: magic on November 13, 2023, 09:30:05 am ---A multi-vendor standard line of batteries would be the right step, but I doubt it's happening.
--- End quote ---
Like this one that’s been around for years?
https://www.cordless-alliance-system.com/
magic:
--- Quote from: tooki on November 13, 2023, 05:56:22 pm ---
--- Quote from: magic on November 13, 2023, 09:30:05 am ---A multi-vendor standard line of batteries would be the right step, but I doubt it's happening.
--- End quote ---
Like this one that’s been around for years?
https://www.cordless-alliance-system.com/
--- End quote ---
Not one but two, if not more ;)
--- Quote from: wraper on November 13, 2023, 12:52:48 pm ---https://www.bosch-presse.de/pressportal/de/en/save-money-space-and-time-with-one-battery-for-many-brands-215504.html
--- End quote ---
tszaboo:
--- Quote from: Monkeh on November 13, 2023, 01:26:55 pm ---
--- Quote from: tszaboo on November 13, 2023, 12:43:55 pm ---You place the charging circuit into the battery pack.
--- End quote ---
Yes, let's duplicate the 48V input step down converter across every pack. Some people have dozens. Yay, we're saving the planet!
Consumer toys little more capable than your wrist might benefit. Serious power tools need not apply.
--- End quote ---
Sure, because a single SO8 charger is such a burden, especially that you need an inductor and maybe a couple tens of microfarad of capacitors with it. So your reasoning that his much circuit
in a battery pack is more environmentally harmful than this:
Which you throw out when the battery pack is not working anymore. Together with the power tool. Because 10 years from now you cannot get a replacement battery because the brand is using a slightly different battery, that's not compatible anymore.
I'm sorry, but I don't like bullshit, just say that you don't like the idea because it's different from what you are used to, and you refuse to change.
Simon:
--- Quote from: wraper on November 11, 2023, 11:21:17 am ---
--- Quote from: AVGresponding on November 11, 2023, 10:50:38 am ---NB: You septics call 18V Li-ion batteries 20V, for some reason.
--- End quote ---
Manufacturers call them so to begin with :palm:. It depends on what voltage you take, nominal or fully charged. Also if we start nitpicking, septics do not talk, they collect excrements.
--- End quote ---
No, it's an American thing, Bigger is better, our American group MD believes this bullshit. Dewalt sell in the US and Europe, same batteries in the US are 20V and Europe 18V, standards were established for a reason.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version