Materials:
- LED panel 12V 70 W -
- 18650 batteries – 18 pcs. -
- Charge controller 3S for 18650 11.1V 25A -
- wires;
- aluminum case from the power supply;
- double-sided adhesive mounting tape;
- thermal paste;
- key switch;
- charging connector and charger;
- door handles – 1-2 pcs.
Making a powerful flashlight
To power the 12V 70W LED panel, you need to assemble a battery pack with the appropriate parameters. The batteries for it can be removed from old laptop batteries. Before this, each of them needs to be tested. You will need to select 18 living batteries and assemble a large block from them. It will consist of 3 small blocks.Each of them uses 6 batteries connected in parallel. To connect them, you need to solder the contacts with a wire, or, as in the example, use plates and spot welding.
Then 3 small blocks with batteries connected in parallel are connected to the controller according to its circuit in series. The battery assembled in this way will have the required voltage of 11.1 V and a large capacity. The controller can be glued directly to the batteries using double-sided tape.
Next, an LED panel is screwed onto the aluminum case from the power supply. Before this, thermal paste is applied to its location so that the case effectively removes heat from LEDs and scattered it.
The assembled battery is glued into the case using double-sided adhesive tape. To securely attach the batteries to each other and protect the contacts from moisture, you need to seal it with tape. The battery is also additionally attracted to the body by a steel tape.
Then the contacts from the LED panel are connected to the battery via a key switch. The switch itself fits into the body in a convenient place. Also soldered to the controller are wires from the charging connector installed next to the power button.
The final stage of assembling the lantern is installing the cover and screwing the door handles to the body for comfortable carrying. This spotlight is charged with a 12 V charger.
The light is simply mega.
