In regards to the energy financial institution circuit
On this mission, we will probably be making an influence financial institution utilizing a pre-built energy financial institution circuit and 18650 Li-ion cells. This energy financial institution circuit has an onboard LCD that can present you the overall cost remaining, input-output voltages, and present. It has two USB ports for charging your cell phone. One is of 5V 1A and the opposite is of 5V 2.1 A. So, it’s appropriate for charging each cell phone. One micro-USB port can be current on the board. This micro-USB port is used for charging the ability financial institution. Right here, it’s important to join a 5V 1A adapter.
One energy change can be current on the board for turning ON/OFF the ability financial institution.
For this mission, we’re utilizing Samsung 18650 Li-ion cells. These are one of the best and broadly used Li-ion cells. A single cell outputs a voltage of 4.2V when it’s totally charged and has a capability of 2200mAH. We will probably be utilizing three such cells. If you wish to improve the ability of the ability financial institution you simply have to extend the variety of cells.
Board Configuration
Options of Energy financial institution circuit
- Twin USB interface one is 1A and the opposite one is 2A
- Steady output present and voltage
- Suitable with all sort of 18650 Li-ion cells
- Enter charging voltage: 5V
- Enter charging present: 1A
- Output present and voltage: 5V/1A and 5V/2.1A
- Over-charge safety
- Over-discharge safety
Options of Samsung 18650 Li-Ion Cell
- lengthy life
- Wonderful cost and discharge fee
- Small in measurement
- Present capability: 2200mah
- Most discharge voltage: 4400mah
- Inner Impedance: <1 ohm
- Commonplace voltage: 3.7V
- Totally charged voltage: 4.2V
- Discharged Voltage: 2.46
Working of this mission
We’ll use three Li-ion cells and join them in parallel to get a present capability of 6600mah. If you wish to improve the capability of the ability financial institution improve the variety of cells. With every cell, the capability of the ability financial institution will probably be elevated by 2200mah.
We’ll get two wires after connecting all of the cells. Now we have to attach each these wires to the ability financial institution circuit. The ability financial institution circuit has an in-built increase converter that can convert the three.7V from the Li-ion cell to 5V. And we’ll get 5V 1A on one USB port and 5V 2.1A on the second USB port. Each these ports are used for charging the cell phone.
Equally, there’s a buck converter current inside this board that can convert the 5V from the micro-USB port to 4.2 volts. This voltage is used to cost the cell.
The ability financial institution circuit board additionally screens the capability of the ability financial institution and shows it on the LCD in %.
This circuit may even shield all of the Li-ion cells from over-charge and over-discharge that can assist in growing the life of every cell.
Circuit diagram of this mission
Steps to create an influence financial institution
Step1: Join all of the cells in parallel as proven within the image. Ensure you use a nickel strip and spot welder for becoming a member of the cell. If use a soldering iron for soldering the wires to the Li-ion cell that can injury the cell and in addition lower the lifetime of the cell.
But when you do not have each spot welder and nickel strip, use the soldering iron and take a look at to not put the soldering iron on the floor of the cell for a protracted interval.
Ensure you are connecting all of the optimistic terminals of the cell collectively and all of the adverse terminals collectively. Don’t join the optimistic terminal of 1 cell to the adverse terminal of the opposite cell, this can quick the cell and there will probably be an opportunity of fireside.
Step2: Join the frequent optimistic terminal wire of the cells to the B+ terminal of the ability financial institution circuit board. Earlier than soldering, makes positive you join that you’re connecting the optimistic terminal of the cells.
Step3: Join the frequent adverse terminal of the Li-ion cells to the B- terminal of the ability financial institution circuit board.
Step4: Join the 5V 1A charger to the board to cost all of the cells and wait till all of the cells are charged. You may also use your cell phone charger to cost this energy financial institution. When the ability financial institution is charging you’ll battery % and IN written on the LCD.
Step5: Now, the ability financial institution is accomplished and you may cost your cellphone by connecting it to any of the USB ports relying upon your cell phone. Press and maintain the ability button for a number of seconds. When the cellphone is charging, you will note the battery % and OUT written on the LCD.
So, the mission is accomplished right here.
