diy lithium-ion battery charger: 8 steps (with pictures)

by:CTECHi     2020-02-02
The battery plays an important role in any battery-powered project/product.
Rechargeable batteries are expensive because we need to buy battery chargers and batteries (until now)
Compared to using and throwing batteries, but very good value for money.
Rechargeable batteries use several different combinations of electrode materials and electrolyte, such as lead
Acid, nickel and cadmium (NiCd)
Nickel Metal hydrogen (NiMH), lithium ion (Li-ion)
Lithium ion polymer (Li-ion polymer). I used Li-
In one of my projects, the Ion battery decided to make a charger instead of buying an expensive one, so let\'s get started.
Here\'s a quick video that will take you through all the steps in a few minutes.
Click here to watch it on YouTube here. This is the list of components needed for this Li-
Ion battery charger.
Here is a list of tools used in this Li-
Ion battery charger.
Now that all the tools and components are in place, let\'s take a look at our TP4056 module, which is an integral part of our battery charger.
Let\'s go into the details of this module.
This Li based on TP4056-there are two versions
Ion charger breakthrough board on the market;
With and Without battery protection circuit.
We will use the circuit with battery protection.
A distribution board containing a battery protection circuit, using DW01A (
Battery protection IC)and FS8205A (Dual N-
Channel enhancement mode for power MOSFET)ICs.
Therefore, the breakout board with battery protection contains 3 ic (
TP4056 DW01A FS8205A)
IC without battery protection (TP4056).
TP4056 is a complete constant-
Current/constant-
Voltage linear Charger Module for single-cell lithium-ion batteries.
The SOP package of TP4056 and the low number of external components make it ideal for DIY applications.
It works with USB and wall adapters.
I have attached the pin diagram of TP4056 (Image No. 2)
Along with the image of the charging cycle (Image No. 3)
Display constant-
Charge current and constant voltage.
The two LEDs on this distribution board display various operating states such as charging and charging termination (Image No. 4).
Safe charging of 3. 7 V Lithium-
The ion battery should be charged in a constant timecurrent of 0. 2 to 0.
Capacity of 7 times until its terminal voltage reaches 4.
2 v, they should be charged later-
The voltage mode before the charging current drops to 10% of the initial charging rate.
We can\'t stop charging at 4.
2v because the capacity reached 4.
About 40-2 v-
70% of full load.
All of this is the responsibility of tp4056.
Now it is important that the charging current is determined by the resistance connected to the PROG pin, and the modules available on the market are usually equipped with 1.
2 KOhm connected to this pin, corresponding to 1 amp charging current (Image No. 5).
You can use this resistor to get the charging current you need.
The link to the TP4056DW01A data sheet is the battery protection IC, and Figure 6 shows a typical application circuit.
Mosfet M1 and M2 are connected externally via FS8205A IC.
Link the data table of DW01ALink to the data table of fs8205a. All these things are assembled on TP4056 Li-
Step No-mention the linked ion Battery Charger patch board in2.
We only need to do two things, give a voltage in the range of 4. 0 to 8.
0 V at the input terminal, connect the battery at B and B
Terminals of Tp4056.
Next, we will build the rest of the battery charger circuit.
Now, Let\'s connect the electrical components using the soldering iron and solder wire to complete the circuit.
I have attached the image of the Fritzing schematic and my physical circuit version to see.
The following is the same description. Done. Note:-
If you are using a 5v wall adapter, you can skip the 7805 regulator section (
Capacitor included)
Direct connection to \'terminal and \'-
The terminals of the wall adapter can be input and input
Pin for TP4056. Note:-
When using a 12v adapter, 7805 will get hot when carrying 1A, and the radiator can come in handy.
Next, we will put everything together.
In order to adapt to the electronic circuit, please follow these steps to modify the housing.
After modifying the shell, let\'s install the electronic equipment.
Follow these steps to put the electronics into the enclosure.
Finished lithium
As shown in figure No-ion charger7.
Let\'s test the charger now.
Lithium inserted into the discharge-
Ion battery inside the charger, connected with 12v DC input or USB input.
The charger should flash red led indicating that it is charging.
After a while, the charger should flash the blue led once the battery is charged.
I have attached an image of my charger for battery charging and terminating the charging process. So.
We\'re finally over.
Thank you for your time.
Don\'t forget to check out my other instructures and my youtube channels. .
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