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![Degradation phenomena as the loss of capacity per cycle [28] (DCO stands for Depth of discharge, C is the charge rate and D is the discharge rate).](publication/366609355/figure/fig1/AS:11431281110194216@1672390834936/Degradation-phenomena-as-the-loss-of-capacity-per-cycle-28-DCO-stands-for-Depth-of.png)
Degradation phenomena as the loss of capacity per cycle [28] (DCO stands for Depth of discharge, C is the charge rate and D is the discharge rate).
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![Figure 1. Degradation phenomena as the loss of capacity per cycle [28]...](publication/366609355/figure/fig1/AS:11431281110194216@1672390834936/Degradation-phenomena-as-the-loss-of-capacity-per-cycle-28-DCO-stands-for-Depth-of_Q320.jpg)
Degradation and heat generation are among the major concerns when treating Lithium-ion batteries’ health and performance parameters. Due to the high correlation between the battery’s degradation, autonomy and heat generation to the cell’s operational temperature, the Battery Thermal Management System plays a key role in maximizing the battery’s hea...
Contexts in source publication
Context 1
... the analysis of the references [13,[25][26][27][28], the degradation, as a rate of loss of capacity, can be modeled as a nonlinear function of temperature, charge/discharge current rate and depth of discharge (DoD). Tests conducted in [28] point to a high correlation between the degradation rate and State of Health (SoH) regulation range, 100% to 80%, with a linear fitting, as presented in Figure 1. Considering the degradation versus SoH linear, it is possible to assume that SoH does not affect the degradation phenomena itself. ...
Context 2
... the analysis of the references [13,[25][26][27][28], the degradation, as a rate of loss of capacity, can be modeled as a nonlinear function of temperature, charge/discharge current rate and depth of discharge (DoD). Tests conducted in [28] point to a high correlation between the degradation rate and State of Health (SoH) regulation range, 100% to 80%, with a linear fitting, as presented in Figure 1. Considering the degradation versus SoH linear, it is possible to assume that SoH does not affect the degradation phenomena itself. ...
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... tests made for NCA and NMC cells consist of a comparison to the optimization with simulation results made for the maintenance of battery temperatures above and below the ideal temperature found by the algorithm. The results obtained for the NMC cell at 1C are presented in Figure 10a. The decay for the optimal approach is lower in relation to when Figure 9. Case study summarization as an optimization algorithm. ...
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... tests made for NCA and NMC cells consist of a comparison to the optimization with simulation results made for the maintenance of battery temperatures above and below the ideal temperature found by the algorithm. The results obtained for the NMC cell at 1C are presented in Figure 10a. The decay for the optimal approach is lower in relation to when the battery is kept at temperatures of 27 • C and 37 • C; this means that the degradation rate is lower in the optimal curve, which translates into more useful cycles. ...
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... the simulated case, the optimization provided an increase of more than 200 useful cycles if compared to the other curves, representing an increase of about 40% of the useful life. The result of the test conducted for the same cell under a constant 2C discharge is presented in Figure 10b. If compared with the 1C discharge regime, it is a noticeable and considerable increase of useful cycles in the optimum region, which means that, for the cell in question, the 2C discharge regime offers less cell degradation if compared with the 1C discharge. ...
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... the same way as with the NMC cell, tests are shown with the NCA cell under constant discharge rates at 1C and 2C. Figure 11a presents the simulation results of the NCA cell under a constant discharge rate at 1C. From the image analysis, it is observed that the optimal operating point of the battery is near the temperature of 26 °C, presenting the optimization of about 10 useful cycles more in this case. ...
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... relation to the curve regarding the maintenance of the battery at 35 °C, it is observed a great reduction of total useful cycles, about 75 cycles, when compared with the optimization curve. The result of the test conducted for the same cell under a constant 2C discharge is presented in Figure 10b. If compared with the 1C discharge regime, it is a noticeable and considerable increase of useful cycles in the optimum region, which means that, for the cell in question, the 2C discharge regime offers less cell degradation if compared with the 1C discharge. ...
Context 8
... the same way as with the NMC cell, tests are shown with the NCA cell under constant discharge rates at 1C and 2C. Figure 11a presents the simulation results of the NCA cell under a constant discharge rate at 1C. From the image analysis, it is observed that the optimal operating point of the battery is near the temperature of 26 • C, presenting the optimization of about 10 useful cycles more in this case. ...
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... 2C discharge, Figure 11b, the cell in question has a less pronounced degradation rate behavior outside the optimal point, allowing more flexibility in the cell operation when compared to the NMC cell at the same discharge rate or the same cell under the 1C discharge rate. In this case, the optimum operation point obtained is about 15 cycles more in relation to the closest curve, which indicates the maintenance of the battery at a temperature of 30 • C, and 30 cycles more than the most distant curve, in which the battery is maintained at 45 • C. ...
Context 10
... the same way as with the NMC cell, tests are shown with the NCA cell under constant discharge rates at 1C and 2C. Figure 11a presents the simulation results of the NCA cell under a constant discharge rate at 1C. From the image analysis, it is observed that the optimal operating point of the battery is near the temperature of 26 °C, presenting the optimization of about 10 useful cycles more in this case. ...
Context 11
... relation to the curve regarding the maintenance of the battery at 35 °C, it is observed a great reduction of total useful cycles, about 75 cycles, when compared with the optimization curve. Under 2C discharge, Figure 11b, the cell in question has a less pronounced degradation rate behavior outside the optimal point, allowing more flexibility in the cell operation when compared to the NMC cell at the same discharge rate or the same cell under the 1C The increase in internal resistance increases; in turn, heat generation and, consequently, the power demanded by the cooling system increases. That generates a natural decrease in the autonomy of the device with aging. ...
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