2146
Member
- Joined
- Apr 5, 2017
- Messages
- 40
I have been debating on whether to do a power wall first or work my way up to one. I decided after seeing all the posts of people building Portable Battery Banks to give it a try.
I made a 3S 12P out of a Harbor Freight Case. I used the 4 cell holders just for ease of switching cells out if one went bad. This case will usually stay in the house and not get tossed around so I am not to worried about cells coming out. They seem to be in there pretty tight anyways. I have mounted the cell holders to a sheet of 1/4 inch plexi glass that I had laying around. I used glass fuses rated at 1 amp for positive and negative side of the cell. Then I ran those to a bus bar. I ended up cutting the end of the 4 cell holder off. The part that would go into a circuit board or whatever. I fused on the top side of tab itself. Made it easier for me to switch out fuses and gave me more room to work with.
I have one dual usb port, 2 ( I call them power points) Cig Plug outlets. 1 I use for charging thebatteries externally until I get something better.
I have two NMB-MAT fans up in the corners. One pushing air in and one pulling it back out. It is over kill to have these but I was thinking better to have them and not need them to not have them and need them. They are little 12 volt .15A fans that hardly pull any power.
I ended up putting some lighting under the batteries just for the heck of it. Just some 12 volt strip lighting that I can change the colors on. Mood lighting for the batteries so they don't get lonely
I am not sure if I figured the specs correctly but what I got is roughly 24Ah, and 850Wh. For some reason I added all the cells capacity for Wh.
I ran the pack(Starting Voltage 12.46) until it shut down due to low voltage(9.6) volts, (3.2) per cell. After it shut down it rested at about 10.08 volts, 10 minutes later it is up to 10.30 and climbing.
Total pulled from the pack 20.397Ah,221.45Wh, total run time 5 hours 18 minutes.
I did find some deviation between packs that I need to fix and will make it run better im sure. Left row is at 24,361, Center row is at 20,181, and right row is at 24,722. little out of whack. oops. Deviation between left and center 4.180 Ah, center and right pack 4.541Ah.
I am probably forgetting stuff so any questions or improvements are always welcome.
As of right now I use a Antimatter charger to charge the pack. I plug right into the pack after I disconnect it. I would like some way of using a regular lets say laptop charge I can plug right into the wall. I am not sure of what all I would need to do this? Anyone have any ideas?
I made a 3S 12P out of a Harbor Freight Case. I used the 4 cell holders just for ease of switching cells out if one went bad. This case will usually stay in the house and not get tossed around so I am not to worried about cells coming out. They seem to be in there pretty tight anyways. I have mounted the cell holders to a sheet of 1/4 inch plexi glass that I had laying around. I used glass fuses rated at 1 amp for positive and negative side of the cell. Then I ran those to a bus bar. I ended up cutting the end of the 4 cell holder off. The part that would go into a circuit board or whatever. I fused on the top side of tab itself. Made it easier for me to switch out fuses and gave me more room to work with.
I have one dual usb port, 2 ( I call them power points) Cig Plug outlets. 1 I use for charging thebatteries externally until I get something better.
I have two NMB-MAT fans up in the corners. One pushing air in and one pulling it back out. It is over kill to have these but I was thinking better to have them and not need them to not have them and need them. They are little 12 volt .15A fans that hardly pull any power.
I ended up putting some lighting under the batteries just for the heck of it. Just some 12 volt strip lighting that I can change the colors on. Mood lighting for the batteries so they don't get lonely
I am not sure if I figured the specs correctly but what I got is roughly 24Ah, and 850Wh. For some reason I added all the cells capacity for Wh.
I ran the pack(Starting Voltage 12.46) until it shut down due to low voltage(9.6) volts, (3.2) per cell. After it shut down it rested at about 10.08 volts, 10 minutes later it is up to 10.30 and climbing.
Total pulled from the pack 20.397Ah,221.45Wh, total run time 5 hours 18 minutes.
I did find some deviation between packs that I need to fix and will make it run better im sure. Left row is at 24,361, Center row is at 20,181, and right row is at 24,722. little out of whack. oops. Deviation between left and center 4.180 Ah, center and right pack 4.541Ah.
I am probably forgetting stuff so any questions or improvements are always welcome.
As of right now I use a Antimatter charger to charge the pack. I plug right into the pack after I disconnect it. I would like some way of using a regular lets say laptop charge I can plug right into the wall. I am not sure of what all I would need to do this? Anyone have any ideas?
