What Do Those Important Parameters Of New Energy Lithium Battery Represent? -4

7. Self-Discharge

Self-discharge phenomenon: Batteries can also lose power if they remain idle and unused. When the battery is placed, its capacity is decreasing, the rate of capacity decrease is called the self-discharge rate, usually expressed as a percentage: %/month.

Self-discharge is what we do not want to see, a fully charged battery, put a few months, the power will be much less, so we hope that the lithium-ion battery self-discharge rate the lower the better.

Here we need to pay special attention to, once the self-discharge of lithium-ion batteries lead to battery over-discharge, the impact is usually irreversible, even if re-charging, the battery’s usable capacity will have a great loss, life will be a rapid decline. So long-term placement of unused lithium-ion batteries, the battery must remember to charge regularly to avoid over-discharge due to self-discharge, performance is greatly affected.

8. Operating Temperature Range

Due to the characteristics of the internal chemical materials of lithium-ion batteries, lithium-ion batteries have a reasonable operating temperature range (common data between -20 ℃~60 ℃), if used beyond the reasonable range, it will have a greater impact on the performance of lithium-ion batteries.

Lithium-ion batteries of different materials, the operating temperature range is also different, some have good high temperature performance, and some can adapt to low temperature conditions. The operating voltage, capacity, charge/discharge multiplier and other parameters of lithium-ion batteries will change very significantly with the change of temperature. Prolonged use at high or low temperatures will also cause the life of lithium-ion batteries to decay at an accelerated rate. Therefore, efforts are made to create a suitable operating temperature range in order to maximize the performance of lithium-ion batteries.

In addition to operating temperature restrictions, the storage temperature of lithium-ion batteries is also subject to strict constraints, long-term storage at high or low temperatures will cause irreversible effects on battery performance.