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Let's do a tutorial where we will convert these four 3s lipos 1300 to 4s batteries 1300
First let's take stock of the materials you require
Having a cutter blade as sharp as possible or scalpel tip always have more and allows you to make it easier
We will also need a pair of pliers and a soldering iron of 50 watts
With less than 50 watts it is quite difficult to do
Remember that the batteries do not like to apply heat to them
If you apply too much heat break down
With 30 watts welder you could also do but need to be longer
applying heat to be transmitted to the cell and that the damage.
A multimeter or tester, you need to verify that we have built good batteries.
This is converted already has a voltage of 15 volts is another has a voltage of 11 volts.
More volts gives them this additional cell that will add
duct tape transparent tape a little tin or color,
We will also need some bags with connectors for batteries 4s fifteen
3s battery cables and has 4 4s battery has 5 wires
So we need to change the by-4s 3s
These covers bearing the serial batteries can also be found on Ebay color easily
This is 10 centimeters bone 100 mm, transparent polycarbonate or used a small aluminum plate
As in this case to reinforce the *** battery twenty
With this you alargareis much battery life
If something hard hit is scored but does not reach the cell drill twenty-one
Here we have 4 brand new batteries but can also use old
but we must always use similarly used batteries
You can not do with a new battery cells adding an old battery
must go very carefully not circuiting, the battery to swell and can get to explode
This is a complicated and remote situation but it is possible
so you are warned and that everyone assumes their risk and knowing what is
4 batteries for three cells are 12 cells, which in turn will give us 3 batteries 4 cell
You have to remove the outer plastic completely
I will do so on the one hand conservare the label to put on the new battery
Never stick anything in the cells, first because they spoil and second because it could burn
For this we use a cutter
Never nail the cutter and use it with the edge out
This procedure is also very useful when we want batteries that do not exist on the market
For example 800 mah battery 4s that cost a lot to find, there are none
This is a way of hacértelas yourself, you buy batteries 800mAh 3s and 4s become a
This same process can be done to make batteries 3s to 6s
All you have to do is calculate the number of cells that need
Now we will remove this protective interior.
Each brand wear their protective layers
there are even carrying an aluminum sheet in this case is rigid plastic
that is attached and only have to carefully remove
It also will remove the protective cover
Here are the battery terminals Four. Five
This is a cell having two terminals,
This terminal here is connected to the cell middle
The cell in the middle has a terminal here and another terminal I is attached to the outer cell
and the outer cell has here the other terminal
To move from 3s to 4 s, what to do is one of the 4 batteries fifty
completely undo, bone divide their cells and that they are separate
and each of these three cells add it to the other 3 batteries
The cells between them are stuck, you should never use a metal cutter or anything
A good use for the blades of broken drones, is to use them to split cells without damaging them.
What intersperse among them and carefully peeling off the cells we
The advantage of using a shovel and plastic is that there is no risk to damage anything
This is the procedure for having prepared the battery that we want to separate
Now we take another battery and do the same will we get the plastic
This is not the'll get rid of all
It will be one of the batteries that keep intact adding another cell
The second battery and the first battery
Now we will make part of the most delicate and crucial process of the whole process
It is the following, these cells have a com stapled tab that is made of aluminum
Aluminum has the problem that it is impossible to weld with tin
In order to weld aluminum we should put a special liquid
it is very difficult to achieve
So in any case not completely split up tabs
because we could not use one of the cell,
We will use this technique, the tab will cut in half by cutting the lead on this side
and back on the side opposite
so that each cell will have half the part Tinned
This always has to be done very carefully because we will not charge us the tab
If one of the cells we let the flangeless that cell would have to rule
The first thing we will do is remove all cables, using a welder
Giving powerful enough heat to one of the tabs and will remove cables
This part is dangerous and can give scares, putting the soldering iron on a tab
We must avoid touching the other to have no short
So we use a piece of tape from before and that we remove the terminal cover
now we can apply heat to the other without risk of shorting
we have half removed cables
These tabs are also very fragile aluminum
so you have to treat them carefully as they could from
Once we have removed all the wires we stay the more complicated part
The first thing we will protect the terminals to prevent short circuits
one of them did not touch and leave well protected
This one just leave it well protected
So we only have the two we have to manipulate
Tin will distribute evenly so that it easier to cut
Once we tinning well distributed over the terminals
we'll take a pair of pliers and cut by half the tab
Repeat the process on the other tab carefully when handling aluminum
one-half behind and the other in front
This is a critical moment must handle with care
To avoid minimizing the possibility of short
Apply a controlled force
So we have two pieces with tin attached and we can separate the cell
This is a delicate operation and we must be careful
once ready we will have three separate cells
Each with enough tin and then make a new weld
the next step is to know that cell we and where we
The cells have polarity so we will use the voltmeter
We take a cell and measure cell marker
Select a cell for incorporation into a battery
we link positive to negative
We use a cell setting tab so that we avoid putting more necessary cable
Here we put the negative to the positive of this one so make sure the cable directly
Now desoldamos the other cable
Positive anger soldier to the other terminal and the negative lead
not to because there is a risk they do not touch
we protect it to avoid any danger with a ribbon
We have a small foam blocks that use
so that the terminals do not suffer, so we can weld without the tongue suffer
We proceed with the welder to join both flanges
Thus we have perfectly united cell
next step is to attach the positive lead to terminal last
As the cable is long we cut a little of it so that it is compensated
we cut some wire and tin-plate
Then welded to the terminal, protecting a tape to avoid touching the welder
we have it if we do a check use the multimeter
Proving that we have a battery voltage 4s
balancer 4s battery takes 5 wires
So we missing a cable connected to the new terminal we added
For this will move this connector cables to another 4s
for then add the missing cord
so Let's spend the battery connector 3-cell to 4 cells
It is an easy process, squeeze the cable and connector tab this out easily
With the cable outside the tab to replenish it does not slip out easily
Notice that we have taken the last and where we now
We added wire to one of the cells and easily put them on your site
This moving operation wires must be done one at a time
because if they touch each risk sparks with short
One by one we put the cables in the correct position
We will take the fifth cable, we reaprovecharemos a battery
we have removed, in this case for example, we take the red
Pulling it out of a balancer and welding adding to the cell that we have incorporated
Add a little more tin
Now we have all the cables in all corresponding cells
the new cable protection
The next step is to check that the battery has all of its operating cells
for it will use a battery tester, placing it in the Balancer
To see all the cells actually give us your stress
We shall now proceed to the final part which is close the battery again
First check that all terminals are properly protected
Reusing these small sponges for it that will protect the terminals
So we could use new tape, in this case we will do with this
which is already cut and ready to exact size
The more new battery is more elements can take advantage of this type
Once we have the perfectly protected list terminals
Now we must contemplate the possibility that this new battery 4s
Whether for a drone racing, in which case we see a problem
and batteries tend to shoot out, in my case all my
batteries such drones are marked by here
All have strokes in this area, so I'll use a small plate
aluminum to perfectly protect this area, putting this maneraP
Has used the scissors to cut and take measures
High-end batteries, all carry such protection
Now we bend the sheet to shape easily
This part is dispensable, it is not necessary but always come good
This sheet can add 3 or 4 grams total weight of the battery
but we save the worst blows, we round the edges so that in case
impact these do not pierce the battery
Once rounded edges, we see that in this case when the battery
new still retains some adhesive, provide us this placement
Also in this case, we will customize a little more battery , this operation
and depends on each tape will make it all more compacted
Finally take off the sticker with all the information in the cells,
This comes off without a problem, this operation more than aesthetics is to know
what kind of batteries we have in hand,
if we put unlabeled we would not know which type of battery have.
And finally we put the plastic outer shield as follows
is cut leaving a reasonable margin of each side and middle finger more or less
We put the cover and used for this process, a hot air gun
if we apply this plastic hot cut and cracks
so we will slowly and carefully heat gradually giving
and homogeneous on all sides, while hot still allows us
move to place in the best way,
With this we finished our battery 3s to 4s.