Smith6612 t1_iuev5fk wrote on October 30, 2022 at 8:11 PM

Reply to comment by MadLintElf in Fires from exploding e-bike batteries multiply in NYC — sometimes fatally by zsreport

I remember Louis Rossmann going through something similar with his eBike, where the manufacturer of one battery company was found cutting corners and not being up front about it. He went as far as demonstrating the protections of another battery on live stream, and explaining the situation which caused his battery set to go on fire.

Lithium batteries are no joke.

DavidJAntifacebook t1_iuexmgg wrote on October 30, 2022 at 8:28 PM

> He went as far as demonstrating the protections of another battery on live stream, and explaining the situation which caused his battery set to go on fire.

Would you link to this?

Aleucard t1_iufv18n wrote on October 31, 2022 at 12:25 AM

Might take a bit for me to find where he tore down the proper well-made battery to show how it's done, but here is where he talks about his Unit Pack Power battery deciding it wanted to be fireworks.

MadLintElf t1_iuf0oiw wrote on October 30, 2022 at 8:48 PM

At my hospital we use lion batteries for mobile cart computers. In the last 10 years we only had one go bad on us. These batteries run a computer/monitor for 8 hours at a time and cost around 1K USD.

When that battery went the housing split and out of a pinhole smoke shot out, thankfully no flames. We put it in a metal bin, put the bin in a cinderblock walled stairwell and let the fire department handle it. But thankfully no cascade failure.

askjacob t1_iugcz9p wrote on October 31, 2022 at 2:45 AM

Are they Lithium Polymer, or Lithium Iron Phosphate?

The latter have slightly less capacity, but are considerably less spicy and can handle thousands of charge cycles so tend to be used more in situations like this.

MadLintElf t1_iuinyjm wrote on October 31, 2022 at 4:54 PM

The one's at work are Lithium Polymer, we need the energy density for the devices. That being said I'm glad we went with them based on the track record.

We did have an option for cheaper batteries, but the company wouldn't provide a warranty since we would be buying from another manufacturer that only covered replacements. They specifically had in the documentation that they were not responsible for overcharging the batteries or battery failure damages.