I don't know what the discharge specs are for the cells that I'm using but the battery pack is used in a electric lift with a motor, and I only discharge them with 1A per pack of four 18650 cells in parallel so about 250mA per cell in theory if the cells where equal.
It drops instantly when i connect the load. Of-course the voltage will drop overtime, but the voltage of the pack drops instantly when I connect the load. The pack is a 7s4p prebuild pack from a machine, I don't have fancy equipment to test the pack in one go so I discharge each parallel block...
Speaking about voltage drop, what is an acceptable voltage drop while discharging,
I discharge my individual 18650 cells with 1A or 0,5A.
I also have a battery pack that I am testing right now that had four 18650 cells in parallel, the pack drops from 4,0V to 3,7V when discharging with 1A.
Thanks for your answer. Yes i am in search of high capacity pouchcell that fit in a area of 140x70mm the cells i linked from hobby king just fit in it. but those are high discharge cells nothing wrong with high discharge. But I think there are cells with the same size but with higher capacity...
After some searching on Hobby king i found these cells:
5000mah 20c not a very high capacity, I think these cells are meant for high discharge.
I need high capacity not high discharge. Does someone else have an idea?
Yes, but maybe it is me i cant seem to find pouch cells on Nkon. Maybe there is another site that sells new pouch cells?
Those are high amperage cells I am looking for high capacity.
It hassen't necessarily be new cells but I want the highest amount of capacity per size.
It has been a long time since i was active on this forum, I hope you all doing well.
My power wall is slowly going along, but this post is nothing power wall related.
I am really interested in portable servers. specially in servers in a gameboy shell.
But i cant seem to find a...
I have a old 7.2v ni-cad Makita drill that i have converted to 2s2p lithium ion 1860.
The drill pulls 10 amps under full load off the pack, So if i want the over/under voltage protection i need a bms that can handle that amount of amps pulled trough it. with the previous bms i dint wired the...
Thanks for your help, that is why i saw no difference after a month the cells where around 3,9V.
But that doesn't explain why i couldn'tmeasure anything at the outputs of the bms, Can someone explain this.
Thanks in advance.
I have a makita 7,2v drill with ni-cd batterys.
All the batterys made for the drill are all dead.
So i taught i could but a 2s2p 18650 pack in the drillso i did.
There is enoughroom for a bms and a charger.
So i ordered a bms from aliexpress:
After i received it i wire it...
Time has flown by since the last update.
I started to draw a flowchart for the powerwall in a online program called draw.io.
In the shed i have mounted an wooden board where everything will be mounted: battery's BMS Charge controller.
I contacted theperson at my local hackerspace that...