Commonly used battery equalization charge technologies for lithium-ion battery packs include constant shunt resistor balanced charging, on-off shunt resistor equalization charge, average battery voltage equalization charge, switched capacitor equalization charge, step-down converter equalization charge, inductive equalization charge, etc.
We subsequently propose on-line equalization algorithms for lithium-ion battery packs based on charging cell voltage curves (CCVCs). The objective of these algorithms is to maximize pack capacities by conditioning CCVCs. As the first paper of the series, we first briefly review equalization topologies and algorithms.
The equalization strategy is embedded in a real BMS for practical application analysis. Lithium-ion battery pack capacity directly determines the driving range and dynamic ability of electric vehicles (EVs). However, inconsistency issues occur and decrease the pack capacity due to internal and external reasons.
We therefore propose two effective on-line equalization algorithms aiming at maximum pack capacity for lithium-ion battery packs based on charging cell voltage curves (CCVCs). The first part of the series briefly reviews equalization topologies and algorithms.
Limited by the “weakest cell”, the maximum available capacity of battery pack without equalization in Case 1 and Case 2 are only about 642mAh and 588mAh, respectively. With the designed equalization strategy, the maximum available capacity of battery pack in those two cases can be further improved 10.29% and 10.25%, respectively.
Battery pack equalization strategy based on UCCVC hypothesis is proposed. The convergence of equalization is obtained in different inconsistent conditions. The equalization strategy is simulated in fresh and aged scenarios. The equalization strategy is embedded in a real BMS for practical application analysis.
Finally, the results of simulation and experiment both show that the equalization strategy not only maximizes pack capacity, but also adapts to different consistency scenarios. Pack capacity and consistency in the fresh or aged state are significantly improved after battery equalization.
Commonly used battery equalization charge technologies for lithium-ion battery packs include constant shunt resistor balanced charging, on-off shunt resistor equalization charge, average battery voltage equalization charge, switched capacitor equalization charge, step-down converter equalization charge, inductive equalization charge, etc.
The lithium battery protection board is a core component of the intelligent management system for lithium-ion batteries. Tel: +8618665816616 ; Whatsapp/Skype: +8618665816616; Email: sales@ufinebattery ; English …
Battery protection unit The battery protection circuit disconnects the battery from the load when a critical condition is observed, such as short circuit, undercharge, overcharge or overheating. Additionally, the battery protection circuit manages current rushing into and out of the battery, such as during pre-charge or hotswap turn on. BMS IC ...
The battery pack is at the heart of electric vehicles, and lithium-ion cells are preferred because of their high power density, long life, high energy density, and viability for usage in ...
Lithium-ion battery pack capacity directly determines the driving range and dynamic ability of electric vehicles (EVs). However, inconsistency issues occur and decrease …
In this series of two papers, we discover that DCE is a feasible and appropriate on-line equalization topology for battery packs in EVs. We therefore propose two effective on-line equalization algorithms aiming at maximum pack capacity for lithium-ion battery packs based on charging cell voltage curves (CCVCs).
For the secure usage of battery charging and discharging within electric vehicles, the study of cell pack equalization technology is essential. Therefore, in this paper, an improved Bidirectional Cuk equalizer (BCEQ) …
In the series of two papers, we discover that dissipative cell equalization (DCE) using dissipative resistances is a feasible on-line equalization method for battery packs in EVs. …
1 · In order to improve the balancing rate of lithium battery pack systems, a fuzzy control balancing scheme based on PSO optimized SOC and voltage membership function is …
A flyback DC-DC converter is utilized to perform the charge equalization and battery charging. The charging of lithium-ion battery is executed by constant current- constant voltage (CC-CV) charge ...
In this paper, an equalization strategy is proposed to solve the inconsistency issues. The difference of inconsistency for lithium-ion battery pack equalization is determined based on the …
Lithium-ion battery pack capacity directly determines the driving range and dynamic ability of electric vehicles (EVs). However, inconsistency issues occur and decrease the pack capacity due to internal and external reasons. In this paper, an equalization strategy is proposed to solve the inconsistency issues. The difference of inconsistency ...
Request PDF | On Feb 1, 2014, Yuejiu Zheng and others published On-line equalization for lithium-ion battery packs based on charging cell voltages: Part 1. Equalization based on remaining charging ...
Reference realized the safe charging of aged lithium batteries by using the MPC method. Compared with the traditional SOC control method, the battery pack SOC equalization is faster, the energy consumption is lower, …
Lithium-based battery technology offers performance advantages over traditional battery technologies at the cost of increased monitoring and controls overhead. Multiple-cell Lead-Acid battery packs can be equalized by a controlled overcharge, eliminating the need to periodically adjust individual cells to match the rest of the pack. Lithium ...
For the secure usage of battery charging and discharging within electric vehicles, the study of cell pack equalization technology is essential. Therefore, in this paper, an improved Bidirectional Cuk equalizer (BCEQ) structure based on a variable-domain fuzzy PID (VFPID) control equalization strategy is recommended in stages. With the new ...
In this paper, the equalization control strategy is to use the adaptive PID control algorithm to adapt the duty cycle of PWM, so as to adjust the equalization current, when the difference between the voltage/SOC of the discharged battery and the rechargeable battery is large, the equalization current should be large, and vice versa.
In this paper, an equalization strategy is proposed to solve the inconsistency issues. The difference of inconsistency for lithium-ion battery pack equalization is determined based on the uniform charging cell voltage curves hypothesis. Stability of the sampling voltage interval and convergence of equalization are analyzed experimentally.
In this paper, the equalization control strategy is to use the adaptive PID control algorithm to adapt the duty cycle of PWM, so as to adjust the equalization current, when the difference between the voltage/SOC of the …
In this paper, an equalization strategy is proposed to solve the inconsistency issues. The difference of inconsistency for lithium-ion battery pack equalization is determined based on the uniform charging cell voltage curves hypothesis. Stability of the sampling voltage interval and convergence of equalization are analyzed experimentally ...
In the series of two papers, we discover that dissipative cell equalization (DCE) using dissipative resistances is a feasible on-line equalization method for battery packs in EVs. We subsequently propose on-line equalization algorithms for lithium-ion battery packs based on charging cell voltage curves (CCVCs). The objective of these ...
To our knowledge, this is the first work to achieve series-connected battery pack active equalization by fusion of data-driven residual capacity online estimation and global …
To our knowledge, this is the first work to achieve series-connected battery pack active equalization by fusion of data-driven residual capacity online estimation and global optimization-based equalization current calculation. Our work clearly demonstrates the conveniences and great potential of data-driven residual capacity online estimation ...
1 · In order to improve the balancing rate of lithium battery pack systems, a fuzzy control balancing scheme based on PSO optimized SOC and voltage membership function is proposed. Firstly, the underlying balancing circuit is composed of buck-boost circuits and adopts a layered balancing strategy; Secondly, using the states of different battery remaining capacities (SOC) …
As shown in Figure 11(a), the figure identifies 1 is the drive power module, mainly used for charging each battery in the battery pack; 2 for the electronic load module, model N3305A0 DC electronic load on lithium batteries for constant current discharge operation, input current range of 0–60 A, voltage range of 0–150 V, measurement accuracy of 0.02%; 3 for the …
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