Basically, the main pieces that affect charging losses when using an AC (Level 1 or Level 2) charger are the EV’s onboard AC-to-DC converter, the charger, and charging cable, the EV’s battery (and whether it has thermal management), and the charging power.
A significant portion of energy loss occurs when AC power is converted to DC by the on-board charger in your EV. This conversion is necessary because your battery requires DC power, but it isn’t perfectly efficient—some energy is lost as heat. This loss is more pronounced during AC charging since the conversion happens inside the vehicle.
According to , for low currents charging and discharging battery losses are equal, while for higher currents, the discharging losses are approximately 10% more compared to the charging losses. Therefore, the battery percentage charging losses for 10Amps are 0.64%, and for 70Amps are 2.9%.
A reasonable range for battery charging losses is estimated to be between 5% and 20%, with an average value of approximately 10% [7,47, . Efficiency is computed as 100% minus the loss (%). ...
According to the ADAC, you can lose between 10 and 25% of the total amount of energy charged. Quite a number, huh? And the thing is, you normally cannot avoid it - the energy simply gets lost on the way to your vehicle. But why is that? And what can you do to minimise energy loss when charging the battery? Let’s see!
Regular updates can help reduce the energy consumed by the BMS during the charging process. No one wants to pay for energy that doesn’t even make it to their EV’s battery. While energy loss during charging can’t be completely eliminated, there are practical steps you can take to minimize it.
If the efficiency is 80 per cent, 80 per cent of the original electrical energy reaches its destination. In this case, 20 per cent of the electrical energy is referred to as power loss. The classic light bulb exemplifies how high this power loss can be. …