Derating-Prinzip der Energiespeicherbatterie
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When the derating factor is less than one, the derating methods extend battery lifetime by a maximum of ∼400% and a minimum of ∼41%. Three SOC-based derating cases
What is derating a battery?
Operational strategy Derating is the practice of limiting the performance of a battery to ensure safe operation or to prolong lifetime . Here it is used to limit charging and discharging currents under conditions that will accelerate degradation. A total of three scenarios were investigated for each location.
What is the derating factor of a battery?
The derating factor temperature. Under temperatures below 45 °C, the derating factor slightly reached around –0.15 derating factor wend down to –0.75. Therefore, th e charge cut-off current can be derated under high and prolong battery life, as presen ted in Figure 11b. In addition, the discharge C-rate has little
How do I choose the best derating technique for battery degradation?
Battery degradation is complicated and affected by chemistry, operating conditions and design. This leads to the challenge of selecting the most appropriate derating technique. For fresh cells, one should consider static derating with several thresholds (Fig. 7 a).
How long do static derating methods extend battery life?
We quantify the lifetime extension and derating factor of the experimentally validated static derating methods using Eqs (1), (2), (3), (4), as illustrated in Table 5. When the derating factor is less than one, the derating methods extend battery lifetime by a maximum of ∼400% and a minimum of ∼41%.
Can derating become a new standard in current derating?
In comparison to standard derating, the degradation-aware derating achieves: (1) increase of battery lifetime by 65%; (2) increase in energy throughput over lifetime by 49%, while III) energy throughput per year is reduced by only 9.5%. These results suggest that the derating framework can become a new standard in current derating.
How long does a battery last under the same derating factor?
Three SOC-based derating cases are quantified, in order to highlight that lifetime extension under the same derating factor can vary for different batteries and/or aging conditions. When the derating factor is higher than 1, which indicates fast charging, the lifetime in some cases is kept almost the same.