When developing a battery pack, the battery management system and cell stack must work efficiently together. Most development time focuses on protection and electrical requirements, which guide cell selection.
Once cells are chosen, the appropriate monitoring and charging electronics are selected, making assembly straightforward.
However, routine maintenance is often overlooked, though it is essential for longevity.
Why You Shouldn’t Skip Battery Maintenance
Routine maintenance is a must-do for rechargeable battery packs after a set period. It should be done at intervals specified in the cell’s datasheet.
You will often see a “Charge Retention” specification, indicating how many days the battery holds a charge. Also, check for an additional note usually at the end of the data sheet.
This note usually highlights three key factors for for storing batteries safely: the optimal state of charge (usually 40–60%), a safe temperature range, and a monthly recharge/discharge plan.
Check the datasheet or consult the manufacturer for exact recommendations. Proper storage maintains battery health.
The Risks of Not Doing Maintenance
Battery maintenance may seem like extra work, but neglecting it can cause problems.
Without regular upkeep during the recommended storage period, battery packs reach Open Circuit Voltage (OCV), triggering internal protection that cuts cell output. The only way to recover is by recharging the cell.
Storing cells at OCV leads to poor performance and capacity, and can cause component damage or complete failure. This makes the battery pack unreliable and in need of replacement.
How to Take Care of Your Battery Pack
Caring for your battery pack is simple if you follow the manufacturer’s guidelines.
Key habits include:
- Check charge levels: Recharge when charge drops to about 20% – don’t let it drain completely.
- Avoid extreme temperatures: Avoid exposing the battery to extreme heat or cold.
- Use the right charger: Use only the charger designed for your battery.
- Store it properly: Store in a cool, dry place with a partial charge.
Following these steps helps your battery pack last longer and work better, saving money and improving reliability. Routine maintenance makes a big difference.
