When a battery is consistently kept at a high state of charge (SOC), it can lead to deterioration. Here are some signs and reasons why this happens:
Signs of Battery Deterioration Due to High SOC
- Reduced Energy Capacity: A high SOC can lead to overcharging, which stresses the battery, causing it to lose its ability to store energy efficiently. This results in a decrease in the battery’s overall capacity over time.
- Increased Internal Resistance: As a battery deteriorates from overcharging, its internal resistance increases. This affects its efficiency and causes it to heat up during charging and discharging, further accelerating degradation.
- Decreased State of Health (SOH): The SOH quantifies a battery’s remaining useful life. A high SOC can accelerate the decrease in SOH, indicating the need for replacement sooner.
- Shorter Lifespan: Frequently maintaining a high SOC accelerates chemical reactions within the battery, leading to faster aging and a shorter lifespan.
Why High SOC Causes Deterioration
- Overcharging: Keeping a battery at a high SOC often means it is being overcharged, which can lead to excessive voltage. This stresses the battery’s components and speeds up degradation.
- Chemical Reactions: High voltages during overcharging can enhance chemical reactions within the battery, contributing to faster aging.
To mitigate these effects, it’s advisable to avoid consistently keeping the battery fully charged unless necessary, and to follow charging guidelines specific to the battery type for optimal longevity.
Original article by NenPower, If reposted, please credit the source: https://nenpower.com/blog/what-are-the-signs-that-a-battery-is-deteriorating-due-to-high-state-of-charge/
