Extreme teardown: lithium ion battery - Page 1
Forum section: electronics / general

author: NiHaoMike
author_rank: Super Contributor
timestamp: October 18, 2015, 07:50:07 pm
content: Anyone else cringed when he started cutting at the cell?

author: crispy_tofu
author_rank: Super Contributor
timestamp: October 18, 2015, 07:54:11 pm
content: I would just hope he knew what he was doing...Reminds me of G7PSK, who stabbed a battery with a screwdriver...https://www.eevblog.com/forum/chat/what-went-wrong/(luckily it was empty, otherwise problems would ensue)

author: AF6LJ
author_rank: Unknown
timestamp: October 18, 2015, 08:03:31 pm
content: That takes some testicular fortitude.

author: TerraHertz
author_rank: Super Contributor
timestamp: October 18, 2015, 11:47:11 pm
content: Quote from: NiHaoMike on October 18, 2015, 07:50:07 pmYes, because wire cutters were a horribly crude way to do it. Taking edges off precisely with a belt sander would have been better.Why do electronics guys think wire cutters are the solution to every 'how to open it' problem?Don't think I've ever thrown out any kind of dead battery pack without dissecting it to examine the guts.ALL battery packs I've ever seen contained at minimum an over current protection (usually an amorphous thermal resetting fuse (just now I can't recall what those are called), and usually with LiIon packs an over/under voltage protection circuit.

author: TerminalJack505
author_rank: Super Contributor
timestamp: October 19, 2015, 01:03:38 am
content: Good ol' Big Clive. Bless his heart. He does these things so we don't have to. Who can forget this classic...

author: German_EE
author_rank: Super Contributor
timestamp: October 19, 2015, 10:30:13 am
content: If there is a positive and a negative connection on a lithium battery what is the third terminal for?

author: Mechanical Menace
author_rank: Super Contributor
timestamp: October 19, 2015, 10:44:22 am
content: Quote from: German_EE on October 19, 2015, 10:30:13 amSerial connection for reporting back the current charge etc.EDIT: Just checked the datasheet and apparently it's just a charger detect and current sense input.

author: crispy_tofu
author_rank: Super Contributor
timestamp: October 19, 2015, 10:45:49 am
content: Quote from: German_EE on October 19, 2015, 10:30:13 amAccording to this forum thread:http://www.thenakedscientists.com/forum/index.php?topic=40848.0QuoteApparently cheap batteries omit the thermistor circuitry and just make it report 'temp ok', even if it isn't!Quote from: TerminalJack505 on October 19, 2015, 01:03:38 amThat one though.I love how he was so utterly confused!'little pink instructions'

author: G7PSK
author_rank: Super Contributor
timestamp: October 19, 2015, 04:23:28 pm
content: Quote from: crispy_tofu on October 18, 2015, 07:54:11 pmWhen I did that I was wearing a full face mask fire proof overalls and welders gauntlets, that is one reason I was disappointed and felt a bit of a fool,I was trying to prove how dangerous these batteries could be and nothing happened.

author: Towger
author_rank: Super Contributor
timestamp: October 19, 2015, 04:45:25 pm
content: Big Clive just wares a kilt, they are made of stern stuff in Scotland.

author: Mechatrommer
author_rank: Super Contributor
timestamp: October 20, 2015, 03:24:06 am
content: Quote from: TerminalJack505 on October 19, 2015, 01:03:38 amsmokin' pussies... i thought tha' was non-americanish, no?

author: crispy_tofu
author_rank: Super Contributor
timestamp: October 20, 2015, 05:59:37 am
content: Quote from: G7PSK on October 19, 2015, 04:23:28 pm

author: Rick Law
author_rank: Super Contributor
timestamp: October 21, 2015, 03:27:44 am
content: I was waiting for him to put the cell back together...