hi there as you might know during an
older video of mine I explained why USB
type-c is awesome and just recently I
released the video about how to make
your own DIY USB type-c a power delivery
trigger boards and spoiler warning it
was certainly not a simple programming
task that is why I was a bit scared
about the next USB type-c subject I
wanted to tackle which is about creating
a DIY USB type-c PD power bank
the reasons are comprehensible I think
for pure DIY solution I would not only
have to program the PD protocol
negotiations so that the power bank can
act as a source to supply power and as a
sync to charge up its internal
lithium-ion battery bank but obviously I
would also have to manage its bed we
pack by charging it up correctly and
adding all kinds of safety features so I
said to myself why do I make everything
always so complicated and that is why in
this video I will keep it simple and
show you my journey of finding the
perfect power bank I see you for this
task for which coincidentally
ready-to-use PCB
already exists then I will test this PCB
extensively and finally use it in
combination with some lithium-ion cells
I had laying around and a custom 3d
printed enclosure in order to create a
simple yet super useful USB type-c a PD
power bank let's get started
[Music]
this video is sponsored by jl CPC bia
who provide excellent quality PCBs for
very low price i've been using their
service for years and can surely
recommend it so why not upload your
Gerber files today in order to test out
their service like pretty much always
when it comes to finding a special IC I
visited LCSC
who offer thousands of them there I
searched in the PM I see a battery
management section where I got 930
results and thus it took me a couple of
hours to find a Nicaea I was happy with
but eventually I found the IP a 5 3 2 8
P which is according to its English data
sheets a fully integrated bi-directional
PDF 3.0 and fast charge power bank SOC
sounds complicated but in a nutshell
that means it got quick charge
functionality supports USB power
delivery were 5 volts and nine volts as
an input and 5 volts 9 volts and most
importantly 12 volts as an outputs with
up to 18 watts of power which is most of
the time enough for my portable projects
it also comes with all the battery
protection features you need for the
film ion batteries and as a bonus it can
even drive LEDs to show the remaining
capacity of the battery pack simply puts
this was the IC I was looking for but
while going through the 28 pages of the
data sheets I started to realize that
creating a PCB design for this ICEA
might get a bit complicated so just for
fun I searched for this IC e on
Aliexpress and quickly found a PCB it
based around this IC which not only
looked promising according to its
picture and the functional description
text but the price was also quite
tempting
that is why I could not resist and
ordered one which often pecking made a
positive impression concerning its PC
beer and soda quality the only question
was whether this PCB could fulfill all
the features I was hoping for and by
that I mean how fast can I charge up its
battery pack how much current cannot
supply at which voltage level with the
power delivery how efficient is the
circuit while doing all of that
and asked the charging of the battery
pack with all of its protection features
work so let's start off with the
charging tests for which I got this USB
type-c PD charger and this common phone
charger that supports quick charge
before hooking the charges up though I
grabbed myself and old lithium-ion cell
I had lain rounds and connected its two
terminals to my power meter nd B plus
and B minus terminal of the PCB
then I started the charging tests by
shoving a USB tester into the phone
charger plugging all of that into an
outlets and connecting the charger to
the boards with a microUSB cable as you
can see a quick charge seems to work
fine since the phone charger provides
nine point two volts will be current of
around 1.8 m/s which is even above the
chargers limits that equals an input
power of around sixteen point five volts
while the Varia
only gets charged up Wooper power of
around thirteen point seven watts which
means that the efficiency year is around
83% and thus certainly acceptable and if
you're wondering if we use a USB type-c
cable for the phone charger then the
voltage and current values pretty much
stay the same
now if we replace the phone charger with
the USB type-c PD charger and hook up
all the cables then we can find out that
here the voltage is also nine point two
volts but move a slightly smaller
current value of one point seven amps
which was not the Chargers limits
so I guess an input power of around 16
watts is the maximum that is not too bad
considering that my small commercial USB
type-c power bank only features a
slightly higher input power limits now
since I later want to add a battery pack
with a capacity of 74 what hours it
means that the Oval charging time would
take around 4.6 hours in my case and
considering that he circuits draws a
standby current of only 54 micro amps
the battery pack will never run empty
but anyway while charging up the battery
I not only realized that the LED
indicator worked just fine
and the charging methods of the
lithium-ion battery was suitable but
also that the overcharge cutoff voltage
was around four point two three volts
and thus still acceptable so all in all
I was pretty happy with the charging /
input features of the boards and thus it
was time for the output tests
I started spy hooking up a USB type-c a
PD trigger boards to the circuits which
as you can see can cycle between 5 volts
9 volts and 12 volts without a problem
that is why next I hooked up a constant
load to the outputs in order to test
well these circuits can surely output
the current little promised in its
description texts and to my surprise
these circuits was truly capable of
outputting we promised 3.1 amps at 5
volts 2 amps at 9 volts and 1.5 amps at
12 volts and while doing this tests I
not only measured the output power but
also the power the bad we had to
provides which later let me create this
beautiful graph as you can see the
efficiency of the converter pretty much
always stayed at around 80% and only a
one time dip down to around 75% which is
pretty decent last but not least further
discharge tests I led the circuit charge
up my Nintendo suite
and while doing so I monitored the
voltage of lithium-ion battery as you
can see at a voltage of around two point
nine volts the circuit
cuts the power outputs which was a
suitable cutoff voltage value so all in
all I can say that I was also happy with
the discharge / output test and thus it
was time to turn the circuits into a
proper power bank for that I first got
myself these six NCR 18 650 beer
lithium-ion cells which I salvaged from
an old battery pack for this power bank
we need to connect them all in parallel
to basically form one big battery but
let me tell you that this is only
possible because there were previously
used together and their voltage values
only differ very slightly movable you
around 0.03 volts from one another if
you would stick together
random cells you got laying around then
this could end very badly you have been
warned but nevertheless I positioned
myself into 18 650 plastic spacers
before I connected them with one another
through the help of some nickel strips
and McKay world's spot welder as soon as
that was done hula to do was to solder a
wire e to the plus and minus terminal
and connect them to the PCB R according
to this rather easy-to-follow
wiring diagram and that is basically
hope you can make a super simple USB
type-c epd power bank but of course the
proper enclosure was still missing so I
measured the dimensions of the PCB and
the battery pack and within a couple of
hours created this enclosure for dole
infusion 360 after then 3d printing this
housing with my 3d printer and some
awesome looking PLA filaments I
hot-glued the battery pack inside the
enclosure security PCB with screws once
again
saudade the battery wires to the PCB
and finally closed everything up and use
some more screws and nuts to keep
everything together and just like that
you can easily build your own USB type-c
EPD power bank which according to its
specifications sits right between my two
other USB type-c PD power banks I hope
you enjoyed this video if so don't
forget to Like share subscribe and hit
the notification bell stay creative and
I will see you next time