Frequent partial discharges can indeed improve the lifespan of a lithium-ion battery, especially when starting with an initial high state of charge. This method reduces stress on the battery by avoiding full cycles, which are known to cause more wear than partial cycles. Here are some key points to understand how this works:
- Reducing Stress: Partial discharge and charge reduce the stress on lithium-ion batteries, thereby prolonging their lifespan. A battery cycled between 20% and 80% charge undergoes less stress compared to being repeatedly fully charged and discharged.
- Depth of Discharge (DoD): Batteries that are not fully discharged (e.g., only 20-50% DoD) can last significantly longer than those fully discharged. For example, charging between 20% and 80% can increase cycle life significantly compared to full cycles.
- Temperature and Storage: While partial discharge is beneficial, it’s also crucial to store and use the battery at moderate temperatures (around room temperature) and avoid overcharging, as high temperatures and full charges can also degrade the battery.
- High Initial State of Charge: If a battery is always kept at a high state of charge, it may suffer from increased degradation over time, especially when exposed to elevated temperatures. Thus, maintaining it between 20% and 80% charge is generally advisable.
In summary, frequent partial discharges can improve the lifespan of a battery by reducing stress and avoiding full cycles, especially if it starts with an initial high state of charge.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/can-frequent-partial-discharges-improve-the-lifespan-of-a-battery-with-an-initial-high-state-of-charge/
