Timeline for 3.7 V rechargeable lithium-ion battery degrading
Current License: CC BY-SA 4.0
17 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 26 at 18:02 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| May 25 at 1:03 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| May 10, 2023 at 22:52 | comment | added | khrissicks | Monica, It would look like this video youtube.com/watch?v=ELKTdfYnCYY Versus the other video where they are testing capsule style lithium ion battery cells. | |
| May 10, 2023 at 5:54 | history | edited | khrissicks | CC BY-SA 4.0 |
added 845 characters in body
|
| May 10, 2023 at 5:23 | comment | added | khrissicks | Monica, an intelligent charger/smart charger for individual cells is ideal. I would like to build one capable of different battery sizes ranging from 1V-12V. The product shown in the YouTube video appears to work for barrel flat top cells, but the batteries I have are block packaged. If I was to use the smart charger shown, and solder extension terminals to work with my block cell, would that work? Thank you | |
| May 10, 2023 at 5:14 | comment | added | khrissicks | Teddy, I did make a typo and meant to write 4.10 V. I’ve checked the internal resistance of a few batteries and have determined that the good ones charge to max 4.14V, having an internal resistance of 56m, and provide the full runtime. A bad battery charged to 4.10V, but gave an internal resistance of 83m. I can see that the trend is any battery of lot 75m or higher is no good. I am looking more into detail on what exact internal resistance impacts performance… | |
| May 10, 2023 at 4:58 | comment | added | khrissicks | Sam, the 3.7V, 1900ma, 7.1 watt/hr battery pack goes into an intercom pack. If I place it in the pack, then I can test how long it takes to discharge, therefor knowing the hour differences between batteries. I have about 200 batteries so this method is rather slow. I also own different batteries of different voltages, so the goal is to sort between the good and the bad batteries. Finding an applicable method to apply to different battery sizes for sorting the bad from the good. | |
| May 10, 2023 at 4:27 | history | edited | khrissicks | CC BY-SA 4.0 |
edited body
|
| May 9, 2023 at 7:21 | answer | added | Chr_arj | timeline score: 1 | |
| May 9, 2023 at 4:38 | comment | added | Harper - Reinstate Monica | You're asking about a readily available consumer product. They make inexpensive battery testers that will fully charge a lithium, discharge it and tell you the watt-hour results. Guys on Youtube who build their own lithium packs use them a lot and own several. They're cheap. youtu.be/tKg-jIrr_JE?t=609 | |
| May 8, 2023 at 22:08 | history | edited | ocrdu | CC BY-SA 4.0 |
deleted 7 characters in body; edited title
|
| May 8, 2023 at 22:05 | comment | added | SamGibson♦ | @LordTeddy - Hi, I'm so used to seeing 4.1 V that I didn't register that. Well spotted. Hopefully the OP can explain more. | |
| May 8, 2023 at 22:03 | comment | added | LordTeddy | You've either mistyped or wrongly charged your batteries. A full charge of a 1-cell Li-ion is 4.2V. 3.1V is dangerously discharged. | |
| May 8, 2023 at 22:02 | comment | added | SamGibson♦ | khrissicks - Hi, This might sound strange, but it seems that you have already identified which batteries give the runtime of 3 hours - because you find that they only give that runtime! So can you edit the question to explain more about exactly what you want, and why doing the procedure you are currently doing isn't good enough? That will help you to get answers which address what you want specifically. Thanks. (Also, as you are new here and Stack Exchange rules are different to typical forums, please see the main site rules & etiquette explained in the tour & help center.) | |
| May 8, 2023 at 21:59 | history | edited | SamGibson♦ | CC BY-SA 4.0 |
Since the question is about rechargeable lithium-ion batteries, not primary lithium batteries, I changed the tag to the correct one. Also added a space between value & units (e.g. 3.10 V) per ISO 80000-1 & best practice for readability.
|
| S May 8, 2023 at 21:45 | review | First questions | |||
| May 9, 2023 at 0:05 | |||||
| S May 8, 2023 at 21:45 | history | asked | khrissicks | CC BY-SA 4.0 |