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Lipo voltage monitor11/23/2023 As the raspberry pi requires a larger load current than out display, the Voltage will have to be reduced to meet the raspberry pi's required voltage and load current minimum Due to the battery's output not being initially satisfactory to power the project efficiently on its own, DC to DC Voltage converters are required to convert the output voltage of our battery to that of the required voltage of each device (leading to an alteration of the batteries maximum output load current also), either by raising or lowering the voltage(hence lowering and raising the current respectively). Now, let us go over our power regulation system. As such the battery can output an average voltage of 7 volts and its current output and capacity being determined by the number of cell groups being used. Lithium-ion cells (on average having a capacity of 3.5 V), are being used to power this project, in a 2S configuration (The cells are ordered in cell groups of which contain two cells wired in series, which each cell group being wired in parallel to each other). We chose a 12-volt monitor for this project, and a raspberry pi operates at a voltage of 5 volts and requiring up to 3 amps to maintain power depending on which raspberry pi board is used. Here is a quick run-through on the theory and principles behind the project, as it is important to understand the basic electronic principles behind this project.įirstly let's assess the core components we chose. 18650 battery cells in even quantities ( Excersize extreme caution when buying lithium-ion cells from vendors who you are unfamiliar with buying from ) (Optional) A 3d Printer to print mounting parts and battery case if needed Single-core small and medium electronics Wire of which can handle at least a maximum of 10 amps A DC TO DC buck converter with USB output: An LCD 12 VOLT rated monitor (I used a 7-inch screen) A Raspberry pi (any board will work, just note the volage requirement and current draw for later reference) and necessary adapters and power cords :
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