hey guys this Frank sorry I haven't been here in a while to post and I appreciate
those of you who are still watching and commenting and subscribing it's just
been really crazy I've been working on my daughter's house trying to get the
remodel done I've just about got all the trim work finished so I can return back
to just working on batteries almost full-time well besides my job and other
responsibilities of being a father of five so I will continue to try to post
on a weekly basis but it's been kind of a long haul lately so with that let's
jump into the continuation of the busbars that I had created in the last
video and how I apply them to the cells to create a battery pack currently it's
running at about 15 point 5 volts so let's go ahead and take a look at that
now
hey guys this Frank and this is the DIY engineer Channel and I am grateful that
you are here if you're into things like solar and batteries and automobiles and
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helpful to you and that it will help you in your projects
alright guys so what I want to show you here is if you remember I was trying to
put together these bus bars and make these happen
I love the loops someone would love to comment about why am I using these
crimps when I could just use a dab of solder and put these together and so
that's exactly what I did so I appreciate the comments thank you so
much that was very helpful you can see here I have my positives this is one
cell bank here and another and two and three four so there's four there's four
cell banks and what we're doing is we're just putting these in in series so we
have a 4s that will run all of these cells and I still need to pull the
numbers on how many amp hours I have in this but I will try to get that and post
it at the end of the video so you can see how many amp hours are in this
actual battery pack so what we're looking at here is I just soldered each
of these together with the fuses and there's a single bus bar that ran down
the side so this is what the straight bus bars were for was to add to the
sides so these went down the sides of each of these loops so that it would all
tie together and that seemed to work out really well so that's this side now
let's review the other side of the battery okay and over here it's kind of
just the opposite where I ran double bus bars over here and then in the center
around the loops because I needed to tie this cell set to this cell set which
then turns out makes this my negative pole this is negative and this is
positive and they're on opposite ends of the battery and the reason for that
is so that the juice will flow through the cell that flows across all the cells
if I had both of my poles on one end what would happen is is I would draw
more from these top cells and less from the bottom cells they would still draw
from them but it wouldn't be as efficient and so by putting them in
opposite corners it actually causes the flow to go across the cells
incorporating more of the cells instead of just a few at a time all right and
what I did is I added in my BMS leads so those are in place one of the things I
learned I haven't done it and I'm not gonna is I can't set this down on its
face like on a piece of metal because it will short there he'll get hot I'll
probably weld it because there's a lot of amps there but right now I'm gonna go
ahead after this video and I'm gonna put on some cap on tape so I have my cap on
tape here and I'll tape these so that they don't they're not exposed and it'll
protect those those leads and then I still have to figure out how I'm going
to connect these together so I'm still working on that engineering piece on how
I'm going to run my my end poles together but that shouldn't be too
difficult so what you're looking at here is this is just a battery monitor and
it's clicking through each of the cell sets so all the cells together I'm
looking at 15.7 the first cell set is 3.9 3.9 3.9 and fourth cell sided 3.86
so they're pretty close to each other not exactly perfect but they are pretty
dang close and I'm happy about that I do have might be a mess for this the
BMS is one I ordered in I actually ordered in some smaller ones you
remember and I didn't I wasn't this is this one here is one of the smaller BMS
is that I ordered in and it just does not handle this has got a 30 amp max so
it's it doesn't handle a lot of amperage and so I use this I'll use this on
smaller packs on smaller cell sets but on these bigger ones like I need to go
to a larger one so I ordered in this BMS here is pretty much a no-name I
did get it on Amazon and it is a hundred amp so it'll allow me to draw 100 amps
from this cell set through this BMS and it also has the balance function so when
I apply this it will actually has the ability to go in and actually balance
out the cells now I can't see a lot going on because there's no lights
there's no nothing and I haven't fully hooked it up yet I still need to hook up
my battery pulse to this and I'll do that probably in the next video to show
you how I did it but this will just mount to the top of this which will
control the voltage and the amperage throughout the cells so that I don't
over charge them or under charge them just allows a little more control and it
also will give me a balancing function so I don't have to worry about going
back and doing like bottom balancing or working through are they balanced and I
can come back with tools like this or it's right here it's on my desk or like
this where I can go through and actually look at the cells in a little more
detail so this one here gives me the ability to where's my negative pole
negative over here and I can go through and look at the cells and see how
charged they are so my type is yeah lithium-ion so I'm showing it 86% on
cell set 1 and then I can walk through each of the different cell set cell set
to is 85% still set 3 is at 85 cell set 4 is at 84 anyway so this has balanced
features and stuff built into it so I could actually use it for a balancer or
I can time into my IMAX 6 Mini and anyways there's a lot of different ways
that I can balance this out but ultimately I'm gonna use a BMS so that I
don't have to worry about it so I can move about without having any issues let
me actually walk through really quick here the I'm going to probably do this
in the next video as well but the BMS system on how this works a lot of these
BMS is will have a diagram showing you how to wire them and on this one it's
really simple because just take the negative which is on this
end over here its user you're black it's usually the black wire on the BMS wiring
and that's my black on this end so I know that that's my negative pole and
that just goes to my first negative and so that's my primary negative so it's
down here so this is connection number one which is my black then connection to
goes between the first battery set which is this battery set and this battery set
on the negative side so I need to go to the other side over here and this is
number two and so you're seeing it's going on the negative side between these
two cells so I'm on this one here and if you look it's the blue wire is number
two and then yellow is number three and that will actually tie to the third
battery set so this is one two three third battery set on the negative pole
so I'm on my negative pole number three and then number four is going to go to
the fourth battery set which is over here one two three four battery set on
the negative pole that's my white wire sure enough on here my white wire and
then the red goes to my concluding positive just like it indicates here so
the last wire goes to positive and then I'll come back and I'll wire a positive
lead from this down here and to actually go to the charger doesn't even go into
the BMS and then the negative this pole down on this end will come back and it
will tie into this battery negative and then the C negative right here is going
to go part of my charging you a little my charging unit so the energy will flow
through here and this here will handle all of the balancing and the battery
activity for charging so I don't over charge or under charge and I don't
overdraw it'll have auto shutoff to protect the cells so it's just another
line of defense against damaging the cells ultimately so hopefully this is
helpful and I appreciate you watching and we'll catch you on the next video