81–90 of 127 posts
I discovered an ancient powerbank the size of a deck of cards that I had not charged in many years, was blown up like a football (imagine an a sealed envelope but full of air)
So that's a dead cell which shouldn't have a charge left but I guess the chemistry is releasing gas?
Scared me, wrapped it in aluminum foil and put it outside asap
Earlier quoted context omitted.
How do you even drain a 3.7V lithium ion battery below 3.3V? My devices that use 18650s will not let them go below that. Is it 3.3V nominal and the actual voltage is lower, like how they’re 4.2V fully charged?
> How do you even drain a 3.7V lithium > ion battery below 3.3V? Connect the + and - terminals with an appropriately sized resistor, it'll drain all the way to 0V. > My devices that use 18650s will > not let them go below that. Because you're not using the + and - terminals, you're using the + and - supply of a BMS, which is connected to those terminals. For this sort of testing you need to bypass the BMS, which'll h…
My actual question should’ve been ‘Do people really use lithium ion batteries in devices without battery managers?’ I absolutely would not.
After we monitored many battery fires, we decided to build a casing which can sustain lithium fires for typical e-bike batteries: https://www.youtube.com/watch?v=v0NXXfCA2CY
Your site (if this is your YouTube video) indicates Bosch compatibility with gen 2 motors[A]. I'm curious as to: 1. It says "Protocol implemented = no", but "Powers bike = yes", you can power a Bosch gen 2 motor without implementing the protocol, presumably this is referring to the CAN wire on the battery. 2. Your battery kit is 316 EUR without cells, and your BMS spare part is 99 EUR. If you can talk to Bosch motors…
Perhaps you can send us an email at contact@gouach.com with more details on your setup, so I can transfer it to the technical team?
After we monitored many battery fires, we decided to build a casing which can sustain lithium fires for typical e-bike batteries: https://www.youtube.com/watch?v=v0NXXfCA2CY
Maybe complement that with a CT-scan of your batteries and AI to detect defects.
After we monitored many battery fires, we decided to build a casing which can sustain lithium fires for typical e-bike batteries: https://www.youtube.com/watch?v=v0NXXfCA2CY
That's a great idea. Are you making a product or sharing the build?
I'm not sure who is in charge of advertising at lumafield but in the last few weeks I've seen James Hoffman use lumafield CR scans on coffee pucks, Jeff Geerling use them on a Pi 500+, and now this. I'm probably not their target market but I definitely know who they are now.