In this paper, we propose a battery equalization circuit and control strategy to improve the performance of lithium-ion batteries.
Fig. 1 (a) shows the capacity degradation curves of battery 1. Obviously, battery 1''s capacity decreases gradually with increasing of cycles. Accordingly, the corresponding charging time also becomes shorter, as presented in Fig. 1 (b). Notably, although SOC online estimation step is needless in the proposed residual capacity-based …
A multi-module equalization system for lithium-ion battery packs. Luping Wu, Luping Wu. College of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai, China. ... Therefore, battery equalization technology plays an important role in improving the performance and safety of battery packs. Among …
The equalization technique is a key technique in the secondary utilization of retired batteries. In this paper, a double-layer equalization method is proposed, which combines the reconfigurable topology with the converter active equalization method. The inner layer uses the reconfigurable topology to have a balanced set of battery cells. …
Distinguished from most of the existing works that focus on the hardware design of active equalizers, this book intends to comprehensively introduce equalization control strategies for lithium-ion …
In this paper, the equalization approaches for series-connected lithium-ion batteries are classifying existing circuits into dissipative ones and non-dissipative ones. Analysis of the …
Battery inconsistency in electric vehicles is an important factor causing battery capacity degradation and safety problems. Therefore, battery equalization …
It has to be mentioned that along the schematics of the different topologies shown in the different figures, I charger is the charging (I charger > 0) and the discharging (I charger < 0) source current. 2.1. Battery selection. By properly selecting cells so that their properties are uniform (similar electrochemical characteristics) [40], [41] in order to make …
In this paper, an inductor multiplexing equalization for Li-ion battery is designed. Compared with the typical inductor equalization circuit, it can reduce the number of inductors and circuit volume. Then, a fuzzy controller based on balancing time and loss is designed. Simulation experiments on typical inductor equalization circuit and inductor multiplexing …
Active equalization was better than passive equalization in reducing battery capacity differences. The maximum difference in state of charges among batteries with active equalization at a current rate of 0.25 C decreased from 10% to 9.207% in discharging, while
Lithium batteries are widely applied in new energy vehicles and related energy storage industries due to their superior performance. The application of an …
Battery equalization is a crucial technology for lithium-ion batteries, and a simple and reliable voltage-equalization control strategy is widely used because the …
Theoretically and ideally, dissipative equalization fully charges and discharges the cell with the minimum cell capacity. This means that the minimum cell capacity is the pack capacity, which can be expressed as (2) C p = m i n C i. In an active equalization, extra energy is transferred from cell to cell all the time, and the maximum …
A novel active equalization circuit based on ring structure is proposed to solve the problems of over equalization, slow equalization time and inconsistent equalization energy of lithium-ion battery packs. The structure adopts distributed equalization of multiple...
In this paper, based on the analysis and comparison of various equalization topologies, an active equalization topology based on flyback transformer is proposed, and the SOC …
However, the indispensable equalizer in a battery management system reduces inconsistency, affecting the accuracy and timeliness of ISC detection. Hence, an online ISC detection method considering equalization electric quantity (EEQ) is …
The terminal voltage of a single lithium-ion battery cell is usually 3.7 V, which is the highest compared with other secondary battery cells. This voltage is insufficient to operate most appliances, such as laptops and EVs. The required voltage of appliances in ...
Lithium-ion battery voltage equalization is of great importance to maximize the capacity of the whole battery pack and keep cells away from over-charge or over-discharge damage this paper, analysis of the working principle of the voltage equalization circuit shows ...
Another advantage of lithium-ion batteries is that they equalize automatically. So this section applies exclusively to lead-acid batteries. Essentially, equalizing or equalization charging is a forced overcharge. This is done by increasing the charging voltage to 110% of ...
Active Equalization of Lithium-Ion Battery Based on Reconfigurable Topology Yanbo Li, Pu Yin and Junshuo Chen * School of Energy and Electrical Engineering, Chang''an University, Xi''an 710054 ...
The equalization technique is a key technique in the secondary utilization of retired batteries. In this paper, a double-layer equalization method is proposed, which combines the reconfigurable ...
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