Can I spin my motor with 18650 cells? скачать в хорошем качестве

Can I spin my motor with 18650 cells?

Let's connect some 18650 lithium cells in parallel to spin my EV motor. But how many do I need? You need to add enough power in parallel, or you will destroy your batteries! Check the calculator here: https://foxev.io/batteries/how-many-b... It is crucial that you understand the Amp-draw of your system, or you will discharge your batteries too hard and permanently ruin them - on a hard acceleration in your car, or on a rapid charger. You need to find out the Amp-draw or kW requirements of your load (motor in our example). Then you need to find out how much you can safely draw from your supply (batteries typically). If you build a system from scratch yourself, you need to find the maximum Amp draw your cells can support (If you don't know what the battery C-Rate is, take a look, I made a separate video too:    • Is Rapid charging bad for your EV? C-Rate ...   ). Leave some room for error, maybe 20%, and work from the bottom up. Example: How many 8000mAh 18650 2C batteries do you need in parallel for 100kW? 8000mAh = 8Ah, You found in the battery datasheet that they are 2C batteries. 8Ah x 2C = 16A is the absolute maximum you can draw per cell. Let's not go near that, and leave 20% room for error, so 13A per cell. So if your motor draws 150A: 16 * 1.2 = 19.2 150A / 19.2 = 7.8 ~ 8 cells in parallel minimum to support the draw. You also need to put cells in series, typically thats 96S or 192S, so you end up with: 96S8P = 768 battery cells or 192S8P = 1536. I go through this calculation in the video with an example with different numbers. The principle is exactly the same! We can also calculate Total Energy: the nominal voltage x nominal capacity. Say your cells are 3.7V nominal and 8Ah each. A 96S8P pack: Voltage = 96 x 3.7V = 355.2V Capacity = 8Ah x 8P = 64Ah Total Energy = 355.2V x 64Ah = 22.7 kWh A 192S8P pack (higher voltage, more energy storage): Voltage = 192 x 3.7V = 710.4V Capacity = 8Ah x 8P = 64Ah Total Energy = 710.4V x 64Ah = 45.5 kWh That’s how you scale a battery pack, or a BESS (Battery Energy Storage Systems). Energy density matters, as well as matching the power requirement to the load and leaving room for error. Check the calculator here: https://foxev.io/batteries/how-many-b...