Samsung recall: Tech solutions to enhance lithium-ion battery safety | EDN

http://www.edn.com/design/power-management/4442706/Samsung-recall–Some-possible-tech-solutions-to-enhance-lithium-ion-battery-safety-

Exploding lithiun batteries are in headlines every now and then. How they can be made safer?

219 Comments

  1. Tomi Engdahl says:

    This DIY Device Will Keep You From Overcharging Your Smartphone’s Battery
    https://www.hackster.io/news/this-diy-device-will-keep-you-from-overcharging-your-smartphone-s-battery-f0accdd9f6b3

    To maintain battery life sacrificing the convenience of overnight charging, Bornach built a device for “Calorie Restricted Phone Charging.”

    Calorie Restricted Phone Charging
    https://hackaday.io/project/171510-calorie-restricted-phone-charging

    Stop overcharging your phone battery overnight. This puts your lipo batteries on a strict diet by limiting the mAh passing over a USB cable

    DESCRIPTION
    Ever since buying a smartphone with an unremovable battery, I’ve become acutely aware of how overcharging the internal lithium polymer battery could prematurely shorten its lifespan. I would always plug in my tablet and phone just before going to bed, so that they are charged to 100% when I wake up the next morning. Various articles on the Internet state that this practice is not optimal for lipo battery health. My phone and tablet might charge fully within a couple hours and thus may spend several more hours above 80% capacity per day. Some guidelines advise that I should aim to keep the lipos below 70-80% and above 20-30% – different sources suggested slightly differing safety ranges.

    What I needed was a timer switch that shut off not after a pre-set duration had passed, but after a pre-set amount of milliamp-hours

    I’m using a MAX471 to measure current passing through a USB charge cable. This is an analog current sensing chip.

    Reply
  2. Tomi Engdahl says:

    Yikes. Maybe I’ll get a Motorola for my next phone instead of a Samsung? [https://www.dailymail.co.uk/sciencetech/article-8370519/Samsung-user-shares-video-Galaxy-A20e-EXPLODES-saying-sparking-burst-flames.html](https://www.dailymail.co.uk/sciencetech/article-8370519/Samsung-user-shares-video-Galaxy-A20e-EXPLODES-saying-sparking-burst-flames.html)

    Reply
  3. Tomi Engdahl says:

    Inside a Znter lithium 9V battery.
    https://www.youtube.com/watch?v=dR_RusM99no

    It’s a rechargeable PP3 style 9V battery that has a built in micro USB charging connector and a generous lithium battery that gives the unit a capacity of around 400mAh at 9V.

    The use of a boost circuit to step the voltage up to 9V means that it remains at that level for the full discharge until the lithium cell’s protection circuitry shuts it off.

    It’s refreshing seeing nicely designed stuff alongside the horrors

    “Batteries are the perfect noise free DC source.” We used to say.
    That’s gone now. Here is a battery with AC ripple on it; a switch mode battery! Please scope the output to see what frequency and amplitude is that ripple.

    Reply
  4. Tomi Engdahl says:

    TP4056 3V7 Lithium Battery Charging/Discharging Module
    https://www.electrothinks.com/2020/06/TP4056-3v7-lithium-battery-chargingdischarging-module.html

    TP4056 is a complete constant current-voltage linear charging module for single-cell 3.7 V lithium batteries. It will continuously monitor the voltage level of the battery during charging and discharging. The module operates with 5V 1A DC voltage, can be provided by the USB mini cable, commonly used in Smartphone chargers. Due to the low number of the external component count, make the TP4056 module ideally suited for your portable electronics applications.

    Reply
  5. Tomi Engdahl says:

    Battery Explosion Connected to the AC Source (120V/230V AC Wall Plug)

    Let’s See What Happens when Battery Connected to the AC Source of Supply Voltage?

    Explanation: https://www.electricaltechnology.org/2020/07/battery-connected-ac-supply.html

    Note: Graphic Content. Viewer Discretion is Advised

    Battery Blasted While Connected to the AC Supply
    https://m.youtube.com/watch?feature=emb_title&v=Ee1bQ_s68m4

    Reply
  6. Tomi Engdahl says:

    Building a Cost-Effective, Multifunction Li-Ion Battery Tester
    Li-ion batteries encompass all shapes and capacities, making it difficult to create a single, integrated tester to accurately handle the range of capacities, currents, and physical form factors. We’ll explore the testing challenges and design solutions.
    https://www.electronicdesign.com/power-management/whitepaper/21137995/building-a-costeffective-multifunction-liion-battery-tester

    Reply
  7. Tomi Engdahl says:

    Hey, Lithium Dendrites: We’re Looking at You—Very Closely
    Researchers are devising ways to accurately assess the mechanical properties of lithium-battery dendrites, as these nanomaterials limit the usefulness and safety of such power cells.
    https://www.electronicdesign.com/power-management/whitepaper/21141009/hey-lithium-dendrites-were-looking-at-youvery-closely?utm_source=EG+ED+Analog+%26+Power+Source&utm_medium=email&utm_campaign=CPS200828034&o_eid=7211D2691390C9R&rdx.ident%5Bpull%5D=omeda%7C7211D2691390C9R&oly_enc_id=7211D2691390C9R

    Reply
  8. Tomi Engdahl says:

    New Lithium Battery Solves Two Key Issues
    https://www.designnews.com/materials/new-lithium-battery-solves-two-key-issues?ADTRK=InformaMarkets&elq_mid=14342&elq_cid=876648

    Current lithium-ion battery designs pose well-documented limitations and challenges so researchers are looking for ways to improve these energy-storage devices.

    Reply
  9. Tomi Engdahl says:

    The engineer thinks the future is in lithium-ion instead.

    Ex-Tesla Engineer Says Solid-State Batteries Are A ‘False Hope’
    https://insideevs.com/news/443450/ex-tesla-solid-state-batteries-false-hope/

    Now at the helm of Sila Nanotechnologies, he believes lithium-ion cells will reach $50/kWh in ten years.

    Reply
  10. Tomi Engdahl says:

    Researchers Develop “Relithiation” Technique to Recycle, Restore Old Lithium-Ion Batteries
    https://www.hackster.io/news/researchers-develop-relithiation-technique-to-recycle-restore-old-lithium-ion-batteries-659db5db9f4b

    Formerly-depleted electrodes show a charge capacity close to that of brand new equivalents, and could solve the battery waste problem.

    Reply

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