Active cell balancing of lithium‐ion battery pack based on average state of charge

Zhang, Zhiyong; Zhang, Liuzhu; Hu, Luojia; Huang, Can

doi:10.1002/er.4876

Cited by 66 publications

(35 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, many literatures have focused on battery model, state estimation, equalization, and fault diagnosis 11‐20 . Many researchers have devoted themselves to improving the accuracy of battery state estimation based on model and algorithm.…”

Section: Introductionmentioning

confidence: 99%

A study of external surface pressure effects on the properties for lithium‐ion pouch cells

et al. 2020

View full text Add to dashboard Cite

Summary Lithium‐ion pouch cells are widely used in electric vehicles because of their high energy density than other structures. There is an unavoidable external surface pressure between the cells in the process of packing and driving of electric vehicles. The influence of external surface pressure on the main properties of the lithium‐ion pouch cell has been studied, which is of great significance to packing batteries and reusing retired cells. In this study, a testing device applied for the measurement of constant external surface pressures of lithium‐ion pouch cells was first proposed and the different pressure stress‐strain distribution on the external surface of cells under semirigid material pads were analyzed by simulation. The effects of pressure on the capacity, internal resistance, and open circuit voltage of fresh and aged LiNixCoyMnzO2 (NCM) lithium‐ion pouch cells are analyzed through experiments under 1 Mpa external surface pressure. The results show that the internal resistance of fresh cells tends to decrease. The average percentage of the maximum reduction of internal resistance is 13.28%. The experiments also demonstrate that the capacity of aging cells increased by 2.3%. Irreversibility of capacity improvement indicates applying appropriate external surface pressure can improve the secondary utilization efficiency of aging cells.

show abstract

Section: Introductionmentioning

confidence: 99%

A study of external surface pressure effects on the properties for lithium‐ion pouch cells

et al. 2020

View full text Add to dashboard Cite

show abstract

“…When the pressure difference is active, the system will select a larger duty cycle in order to quickly increase or reduce hydraulic cylinder pressure. When the pressure difference is positive, the system will choose a smaller duty cycle to accurately track the ideal pressure, and to improve the wheel pressure accuracy and robustness [37,38], specifically as listed in Table 2, where X is the pressure difference, Y1 is the valve duty signal of the booster valve, and Y2 is the duty cycle of the valve control signal of the pressure reducing valve.…”

Section: Braking Controllermentioning

confidence: 99%

Adaptive Cruise Control Strategy Design with Optimized Active Braking Control Algorithm

Zou

et al. 2020

Mathematical Problems in Engineering

Self Cite

View full text Add to dashboard Cite

The braking quality is considered as the most important performance of the adaptive control system that influences the vehicle safety and ride comfort remarkably. This research is aimed at designing an adaptive cruise control (ACC) system based on active braking algorithm using hierarchical control. Taking into account the vehicle with safety and comfort, the upper decision-making controller is designed based on model predictive control algorithm. Throttle controller and braking controller are designed with feedforward and feedback algorithms as the bottom controller, where the braking controller is designed based on the hydraulic braking model. The whole model is simulated collaboratively with Amesim, Carsim, and Simulink. By comparison with the full deceleration model, the results show that the proposed algorithm can not only make the vehicle maintain a safe distance under the premise of following the target vehicle ahead effectively but also provide favorable driving comfort.

show abstract

“…Comfort and safety are important considerations in the automotive industry, 1,2 and the ride comfort and handling stability are direct manifestations of these two properties. Suspension systems are used to transfer forces and moments between the car body and the ground.…”

Section: Introductionmentioning

confidence: 99%

Semi‐active control of air suspension with auxiliary chamber subject to parameter uncertainties and time‐delay

Zhang

Wang

et al. 2020

Intl J Robust & Nonlinear

Self Cite

View full text Add to dashboard Cite

Suspension systems are critical to the ride comfort and handling stability of vehicles, but traditional passive suspensions fail to achieve optimal performance in the two aspects. Semi-active suspension controller changes the suspension stiffness or damping to improve the ride comfort and handling stability, which has the potential advantages of low energy consumption and high reliability. In this paper, the model of an air spring with an auxiliary chamber and a variable throttle orifice is proposed and the semi-active control strategy of air suspension is carried out. The parameters of the air spring with auxiliary chamber are optimized to improve the performance when the control system fails and to increase the basic performance for semi-active control. Based on the linear matrix inequality approach to robust H ∞ control, the semi-active control strategy of the air suspension is studied, in which parameter uncertainties and time delay are considered to improve control robustness. An inverse model of the air spring is then established to calculate the area of the variable throttle orifice, by which the desired control force is tracked accurately. Finally, the effectiveness of the semi-active control system of the air suspension is verified by numerical simulation. Comparing with the passive suspension, not only under nominal parameters, but also with parameter uncertainties, time delay, and both parameter uncertainties and time delay, the semi-active control system proposed in this paper has good control performance as well as is strong robustness to parameter uncertainties and time delay. K E Y W O R D S air suspension, parameter uncertainties, robust control, semi-active control, time delay 1 INTRODUCTION Comfort and safety are important considerations in the automotive industry, 1,2 and the ride comfort and handling stability are direct manifestations of these two properties. Suspension systems are used to transfer forces and moments between the car body and the ground. Thus, the suspension design must be improved to enhance the ride comfort and handling stability of vehicles. However, traditional passive suspensions fail to achieve optimal performance in both ride comfort and handling stability. 3,4 In recent years, in-wheel-motored electric vehicles have become a research hotspot because of their compact structure, high transmission efficiency, and 7130

show abstract

Active cell balancing of lithium‐ion battery pack based on average state of charge

Cited by 66 publications

References 40 publications

A study of external surface pressure effects on the properties for lithium‐ion pouch cells

A study of external surface pressure effects on the properties for lithium‐ion pouch cells

Adaptive Cruise Control Strategy Design with Optimized Active Braking Control Algorithm

Semi‐active control of air suspension with auxiliary chamber subject to parameter uncertainties and time‐delay

Contact Info

Product

Resources

About