Warning: heating earbuds batteries to over 300F also causes fires
    • Rolivers@discuss.tchncs.deEnglish
      22·
      15 days ago

      Well the electrolyte solution is water based so exceeding the boiling point will cause pressure buildup inside.

      Edit: hmm seems I might be generalizing too much. Not all batteries use water based solutions. My point is that you should avoid a pressure buildup inside the battery due to reaching the solvents’ boiling point.

      • isolatedscotch@discuss.tchncs.deEnglish
        19·
        15 days ago

        wha wha what

        no, it’s an organic solvent like ethylene carbonate/propylene carbonate + some other stuff, which have a boiling point of 230+°C ( 446°F)

        heating up batteries is (mostly) fine (under controlled scenarios with known good batteries, spicy pillows can always happen with bad batches) as long as the plastic holding them together doesn’t melt

        you physically CANNOT make a lithium ion battery with water because lithium reacts with water

        from the wikipedia page

        Lithium reacts vigorously with water to form lithium hydroxide (LiOH) and hydrogen gas. Thus, a non-aqueous electrolyte is typically used, and a sealed container rigidly excludes moisture from the battery pack. The non-aqueous electrolyte is typically a mixture of organic carbonates such as ethylene carbonate and propylene carbonate containing complexes of lithium ions.[45] Ethylene carbonate is essential for making solid electrolyte interphase on the carbon anode,[46] but since it is solid at room temperature, a liquid solvent (such as propylene carbonate or diethyl carbonate) is added.

        • Rolivers@discuss.tchncs.deEnglish
          7·
          16 days ago

          Good point. It’s highly concentrated inside a battery if not saturated. Hmm. I still wouldn’t expose them to such high temperatures.

          Perhaps a longer duration at lower temperature is safer. I might try it some day with some waste batteries and a battery tester.