All Questions
7 questions
2
votes
5
answers
1k
views
Is this a good way to make 2S 18650 battery cell while parallel charging?
I want to make a battery pack with 7.4 volt output and I want to charge them with 1A each so I connect them parallelly and input them with 5A 6A DC adapter. (No charging and using at the same time) Is ...
- 1
1
vote
2
answers
101
views
Confused about this BMS
I recently got a BMS model "bw-6022-5s" and planned to use it with my 4S5P (21V) battery pack. However, since this BMS looked different from the ones I'm used to, I did some research and ...
- 8,335
0
votes
1
answer
603
views
Is my 4s2p pack connections correct?
I'm planning to build my 4S2P battery pack using 18650 lithium-ion battery cells. I need to make sure my connections and my battery pack is correct and safe before I make the connections. Here's the ...
- 172k
0
votes
1
answer
111
views
Isolated two battery load/charging system (parallel 18650)
I am working on a project and wanted it to be very robust and user-friendly. To power said device, I had planned on using two 18650 in series (li-ion), like everyone else. The problem I had was that ...
- 25.5k
3
votes
1
answer
131
views
Protecting parallel 18650 cells
My son is doing an Eagle project where he is creating a solar charged LED light set up using two 18650 cells in parallel. We are working to ensure they are safely protected. From the research we have ...
- 25.5k
0
votes
1
answer
86
views
When I test a 18650 Li-ion cell, why do I get two different values of capacity for charging and discharging?
I'm trying to test the capacity of 18650 cells. I don't know which numbers are important. I get different results on the same cells from discharge and the charge.
For example on same 18650 cell:
(...
- 9
1
vote
0
answers
269
views
BMS shows wrong voltage, changes to 0 V under load
I made a 24 V, 4400 mAh lithium-ion battery using 18650 cells connected in a 7S 2P configuration.
When I check the pack output voltage without the BMS it's around 21 V (very low, undercharged). When I ...
- 9,310