I’d like to make a DIY power bank using 18650B batteries to simultaneously power my DSLR, audio recorder, and 7” camera monitor. I know almost nothing about wiring electronics, so I really appreciate everyones help.
My current plan is to wire six 18650B cells in series (22.2v, 3.4 Ah) and have two 8.4v DC outputs, one 5v DC output, and one DC input for charging the cells. I guess I need to incorporate cells wired in parallel to increase the overall amperage.
My camera's power cord outputs 9v 4.5 amps, but it then connects to a dummy battery which may or may not step down the volts and amps (the proprietary camera batteries are 7v 1.9 Ah). My monitor’s DC input can accept 7-24v, but it’s power cord is 12v 1.5 amps (specs say that the monitor draws 12 watts). My audio recorder’s power cord outputs 5v at 2 amps. Near as I can figure, I need at least 8 amps to simultaneously power all devices, and I’d like that battery pack to run for at least two hours.
I really need help calculating the number of cells that I’ll need, as well as schematics to series & parallel wiring combination. I’m also not sure how to wire in a BMS, protection circuit, and over-current and over-temperature protection. I’m also not sure how to wire the outputs; I know that I’ll need a few buck step down converter to get the outputs at the right voltage, but I think I’d need to see some schematics to understand how it’s done. Come to think of it, I’m not sure how to wire the charging input either.
I’d like to keep everything as small and inexpensive as possible, but I’m curious What parts you guys would recommend.
What gauge wire should I use? The answers I got from online calculators ranged from 12-18 AWG.
I already have six 18650B batteries (Panasonic 3500 mah) along with a multimeter and soldering iron. I have a little experience soldering, but I’m not particularly good at it.
Is there anything I’m overlooking or anything you would recommend doing differently?
My current plan is to wire six 18650B cells in series (22.2v, 3.4 Ah) and have two 8.4v DC outputs, one 5v DC output, and one DC input for charging the cells. I guess I need to incorporate cells wired in parallel to increase the overall amperage.
My camera's power cord outputs 9v 4.5 amps, but it then connects to a dummy battery which may or may not step down the volts and amps (the proprietary camera batteries are 7v 1.9 Ah). My monitor’s DC input can accept 7-24v, but it’s power cord is 12v 1.5 amps (specs say that the monitor draws 12 watts). My audio recorder’s power cord outputs 5v at 2 amps. Near as I can figure, I need at least 8 amps to simultaneously power all devices, and I’d like that battery pack to run for at least two hours.
I really need help calculating the number of cells that I’ll need, as well as schematics to series & parallel wiring combination. I’m also not sure how to wire in a BMS, protection circuit, and over-current and over-temperature protection. I’m also not sure how to wire the outputs; I know that I’ll need a few buck step down converter to get the outputs at the right voltage, but I think I’d need to see some schematics to understand how it’s done. Come to think of it, I’m not sure how to wire the charging input either.
I’d like to keep everything as small and inexpensive as possible, but I’m curious What parts you guys would recommend.
What gauge wire should I use? The answers I got from online calculators ranged from 12-18 AWG.
I already have six 18650B batteries (Panasonic 3500 mah) along with a multimeter and soldering iron. I have a little experience soldering, but I’m not particularly good at it.
Is there anything I’m overlooking or anything you would recommend doing differently?