Reasons for high battery discharge current

How does a high discharge rate affect a battery?

Higher discharge rates lead to increased internal resistance, resulting in more significant voltage drops. For instance, discharging at a rate of 2C can considerably reduce the battery’s capacity compared to lower rates. This information is vital for applications where peak power is needed, such as electric vehicles.

How does high charge and discharge rate affect lithium-ion batteries?

The influence on battery from high charge and discharge rates are analyzed. High discharge rate behaves impact on both electrodes while charge mainly on anode. To date, the widespread utilization of lithium-ion batteries (LIBs) has created a pressing demand for fast-charging and high-power supply capabilities.

What happens if a battery is discharged constant power?

Keep the discharge power unchanged, because the voltage of the battery continues to drop during the discharge process, so the current in the constant power discharge continues to rise. Due to the constant power discharge, the time coordinate axis is easily converted into the energy (the product of power and time) coordinate axis.

What is the difference between battery voltage and discharge rate?

Battery voltage is like the runner’s stamina. Discharge rate (C rate) is the running speed. At low C rates, the battery “jogs,” depleting its stamina gradually and providing steady energy for long durations. At high C rates, the battery “sprints,” delivering high power quickly but exhausting itself faster.

What happens if a battery is discharged too much?

As we mentioned above, excessive discharge current can cause the battery to generate a large amount of heat, leading to oxidative decomposition of the electrolyte and reconstruction of the SEI, leading to delamination of the active material layer and causing a damage on the crystalline structure of NCM cathode.

What does discharge rate mean in a car battery?

It’s like the fuel tank of a car, showing how much “fuel” is left. Discharge Rate: Expressed as a fraction of the battery’s capacity (e.g., 0.5C, 1C, 2C), the discharge rate shows how quickly the battery is being used. A higher discharge rate means the battery is “running” faster, depleting its energy more quickly.