Search results

Date Relevance Most replies

  1. J

    Safety of Charging Deeply Discharged Lithium Batteries.

    There are several questions in the original post. You can pick any and answer. Also I stated that I am open to getting more education on safety of lithium batteries so you can do that if you like. Here is a specific question: why it is common belief that a deeply discharged lithium battery...
  2. J

    How to access and remove the battery of this ebike?

    From this website: https://www.chemistryworld.com/news/fire-starting-battery-dendrites-go-with-the-flow/3008867.article If the above site description of "dendrites" is correct, my understanding of the article is that dendrites are a byproduct of charge and discharge cycle and not about how low...
  3. J

    How to access and remove the battery of this ebike?

    OK, it is done and the following link is that thread. Thanks. https://endless-sphere.com/forums/viewtopic.php?f=14&t=102710
  4. J

    Safety of Charging Deeply Discharged Lithium Batteries.

    The following post was written as part of a question I asked regarding removal and charging of a deeply discharged e bike battery. That thread subject evolved into a question of the safety of charging a deeply discharged lithium battery and someone suggested to post it in this forum for a...
  5. J

    How to access and remove the battery of this ebike?

    I have a low opinion of Battery University if it is the same site I was on sometime ago. Although I don't know much about it. I just remember looking up something and was led to that site and what was on there did not seem right. On the other hand, that video I posted of the Michigan Engineering...
  6. J

    How to access and remove the battery of this ebike?

    I am open to be educated more about the safety subject of lithium batteries. I like to know what is the difference between a new and an old battery like these that are very low in charge. Why the danger increases so drastically (it seems that is what you are implying) if a deeply discharged...
  7. J

    How to access and remove the battery of this ebike?

    I appreciate the emphasis on safety. It got me to research how such batteries can catch fire and even explode. This video shows how: https://youtu.be/0nrsoMsEMNU?t=396 In the video they have overcharged the battery by over 20 amps on purpose to cause an explosion. If this battery is going to...
  8. J

    How to access and remove the battery of this ebike?

    Just hooked up everything as was shown in the last post picture and connected to the electrical outlet outside the house. The light bulb came on dim for a few seconds then shut off and nothing after that. I think the original charger won't charge until it sees a certain voltage or something...
  9. J

    How to access and remove the battery of this ebike?

    The battery is setup for charge as show in the picture below. Just wanted to run this picture here to see if anyone sees anything that is not correct. I take responsibility for this no worries. Thanks...
  10. J

    How to access and remove the battery of this ebike?

    OK Voltron thanks for clarifying what you meant. So the increased fire risk remains. I plan to install everything back into the bike's frame (where the battery storage is) and bolt everything up and use the original charging plug to recharge. I think the extra big frame made for the battery and...
  11. J

    How to access and remove the battery of this ebike?

    I originally measured the voltage of each cell of the battery as the following picture shows: Picture one: https://docs.google.com/drawings/d/1dpWDc9h2wAsuJIgB4fFqe5sLvz7QoQ3ELrzjK3l0DUA/edit?usp=sharing But I was informed the correct way to measure each cell is as the following pictures shows...
  12. J

    How to access and remove the battery of this ebike?

    The Wattage of the bulb is 25 W.
  13. J

    How to access and remove the battery of this ebike?

    I made a diagram of what I think you mean by using an incandescent bulb in series with the battery and charger to charge up the depleted battery. The image below shows it. Is this correct? Thank you. https://docs.google.com/drawings/d/1CVfp7gInvTLOnR3fqE5VOuxCRj33LKUilf8F81SDuJk/edit?usp=sharing...
  14. J

    How to access and remove the battery of this ebike?

    Thank you for the reply and the caution regarding possible increase risk of fire. I will charge them in the garage on concrete or metal away from other things. So if I need to charge the pack at very low amperage of 100mA or less, how do I do it? I was thinking of using the original bike...
  15. J

    How to access and remove the battery of this ebike?

    https://drive.google.com/file/d/11vFqrn1OM5igwxhMF9GJTxsNHwhBdnJQ/view?usp=sharing https://docs.google.com/drawings/d/1mVbsNa8781-4wsF-6Ig7g3Egf0JxwTKuJCOTAUZPBow/edit?usp=sharing The above links show how the voltages of each group of 5 cells were measured and what was obtained. The voltage...
  16. J

    How to access and remove the battery of this ebike?

    By the way the links in my post are pictures of the battery etc. In case you did not check them.
  17. J

    How to access and remove the battery of this ebike?

    To test the individual cells: Can I take the strips off one side and then measure the voltage? Or do I have to take the strips off both side to be able to measure the voltage of each cell? Thank you.
  18. J

    How to access and remove the battery of this ebike?

    Actually there are 50 cells in the old battery not 40.
  19. J

    How to access and remove the battery of this ebike?

    The second time I opened the lower compartment of the bicycle's frame and yanked on the cables the battery gradually came out. It was fairly easy. I opened the battery after it was out but had to heat the case to soften the double sided glue inside to be able to open the 2 halves of the battery...
  20. J

    How to access and remove the battery of this ebike?

    The battery of this ebike shows zero volts at the charging port. I want to access the battery and remove it for further testing but I am not sure how. I tried accessing it from below the frame tube as shown in the pictures but no easy access from there. I thought there is probably an easier way...
  21. J

    Help with taking apart a battery pack.

    As I suspected glue was involved. Has to heat the cover with heat gun then with a lot of force applied it finally came apart gradually. Thank you for your help as it encouraged me to push forward to get this thing apart.
  22. J

    Help with taking apart a battery pack.

    I did slide the end (where the connector is) off after taking the 2 small screws out as shown in the pictures. I also tried to open it as you describe and the mid tab did break. But I still could not open it up because it seems something is preventing it from being opened. I don't want to...
  23. J

    Help with taking apart a battery pack.

    Trying to take this battery apart from Ezee Sprint electric bicycle. Have taken all the screws that are circled in the picture (all the ones that are visible). The 2 halves crack slightly open but they won’t come apart, something else is holding the 2 pieces together. Any idea what is holding...
Back
Top