Lithium batteries

pianotuna wrote:

mbloof wrote:

pianotuna wrote:
Since Li don't want to be taken to 100% I can't see why a dc to DC booster would be particularly useful.

Since when? Can you quote a source for that information?

The Battleborn battery I own and even the DIY LiFePo4 cells I bought along a with proper BMS have no issue with being charged to 100%.

- Mark0.

Many many many sources.

Some BMS systems have the 90% set to read as fully charged. Battleborn might be one of them.

The ideal is 40% to 90% for most Li chemistries.

They tolerate 20% state of charge well. But lifespan may be shorter.

Here is a source that suggest maximum of 80% SOC:

https://electrek.co/2018/05/04/are-you-killing-your-lithium-batteries/

this is right from your article you posted

"Does this apply to all lithium batteries?
Theoretically yes, though LiFePO4 batteries aren’t quite as affected by high charge levels as the rest of the lithium-ion lineup. "

I have not seen anyone who is making there own cells not charging to 100%. the numbers of cycles is based on a full discharge from 100 to 0 from my understanding, but yes they will probably last longer if you shallow cycle them like any other batery.

I have been using my 6V GC lead asid batteries now for 12 years and they still work great. why because they are cycled very shallow, never droping below 70% due to my solar and the total capacity.

Steve

Steve