An equalization control strategy conducive to uniform aging for battery pack

2016 ◽  
Author(s):  
Liu Ping ◽  
Zhu Hong-hui ◽  
Chen Jie ◽  
Li Guan-yan
Keyword(s):  
Control Strategy ◽  
Battery Pack

A Dynamic Programming Control Strategy for HEV

2012 ◽  
Vol 263-266 ◽  
pp. 541-544 ◽  
Author(s):  
Babici Leandru Corneliu Cezar ◽  
Onea Alexandru
Keyword(s):  
Dynamic Programming ◽  
Electric Vehicles ◽  
Control Strategy ◽  
Hybrid Electric Vehicles ◽  
The State ◽  
State Of Charge ◽  
Battery Pack ◽  
Matlab Simulink ◽  
Hybrid Electric

Dynamic programming is a very powerful algorithmic paradigm which solves a problem by identifying subproblems and tackling them one by one. First the smallest are solved, and then using their answers, it can be figured out larger ones, until the whole lot of them is solved. This paper presents a control strategy for hybrid electric vehicles, based on the dynamic programming, applied in MATLAB, Simulink environment, using ADVISOR. It was tried this method due to the calculation speed of the suitable torque and speed required from the engine, considering the driver power request (torque and speed), and the state of charge (SOC) of the batteries. Using the fuel converter (FC) fuel map, and the remaining SOC of the battery pack, it was designed an algorithm that will chose at each time the required torque and speed from the first and second source of power.

Research on electric vehicle thermal management system with coupled temperature regulation between crew cabin and power battery pack

2021 ◽  
pp. 095440702199658
Author(s):  
Bing Han ◽  
Fei Liu ◽  
Meng Li ◽  
Jiale Guo ◽  
Yalong Xu
Keyword(s):  
Thermal Management ◽  
Control Strategy ◽  
Temperature Regulation ◽  
Management System ◽  
Air Conditioning ◽  
Battery Pack ◽  
Air Conditioning System ◽  
Vehicle Cabin ◽  
Thermal Management System ◽  
Power Battery

Based on the structure of the thermal management system for electric vehicles, complete the design of the thermal management system for the whole vehicle, and realize the coupling temperature regulation between the vehicle cabin and the power battery pack. A direct cooling system model containing electric compressors, electronic expansion valves, heat exchangers, power battery packs, and other components coupled to the air conditioning system is established. Based on this, a vehicle thermal management model of the entire vehicle including electric vehicle, electric motor, high and low voltage network, vehicle cabin, air conditioning system, and power battery pack is completed. Develop the logic threshold control strategy, compressor speed control strategy, and electronic expansion valve opening control strategy for the vehicle thermal management system. Through the comparative analysis of the temperature control effect of the thermal management system on the cabin and the power battery pack under different ambient temperatures, the effect of different temperatures on the vehicle range is analyzed. The results show that this vehicle thermal management system can meet the requirements for battery pack heat dissipation and vehicle cabin refrigeration.

scholarly journals Research on Equalization Control Strategy of Marine Lithium Battery Pack

2021 ◽  
Vol 2137 (1) ◽  
pp. 012020
Author(s):  
Qi Sun ◽  
Yi Quo
Keyword(s):  
Power Systems ◽  
Control Strategy ◽  
Control Algorithm ◽  
Lithium Battery ◽  
Control Variable ◽  
Clean Energy ◽  
Internal Resistance ◽  
Battery Pack ◽  
Equilibrium Control ◽  
The Individual

Abstract With the widespread use of clean energy in ship electric power systems, marine lithium battery systems are becoming more and more popular. Aiming at the problems between the individual cells in the lithium battery pack, such as inconsistency in voltage, capacity, and internal resistance, the state of charge (SOC) of battery is selected as the equalization control variable, an equalization topology structure based on SOC for battery connecting or bypassing is designed. The equilibrium control strategy fusing model predictive control (MPC) algorithm and time-sequence control algorithm is adopted. The simulation model is built on the MATLAB/Simulink platform, and the different value combinations of two equalization parameters (i.e., equalization period T and number of batteries connected to the battery pack q) were simulated and analyzed. The results show that the designed equalization control strategy can quickly and accurately achieve SOC equalization, by optimizing two key parameters, the equalization accuracy and equalization speed of the marine lithium battery pack can be improved, also the energy loss in the equalization process can be reduced.

Study on the Closed-Loop Control Strategy of Voltage for Pure Electric Vehicle in Limp Mode

2014 ◽  
Vol 721 ◽  
pp. 20-23
Author(s):  
Liang Chu ◽  
Chong Guo ◽  
Yi Yang ◽  
Zi Cheng Fu ◽  
Yuan Jian Zhang
Keyword(s):  
Electric Vehicle ◽  
Control Strategy ◽  
Lithium Battery ◽  
Closed Loop ◽  
Battery Pack ◽  
Closed Loop Control ◽  
Discharge Characteristics ◽  
Loop Control ◽  
Strategy Model ◽  
Verification Test

In order to avoid the nonreversible damage to the batteries because of over discharge when the pure electric vehicle is moving, this article proposes a driving control strategy in limp mode due to under voltage. Firstly, research the discharge characteristics of the lithium battery pack. Secondly research and develop the control strategy that limit the motor torque by the closed-loop control of voltage. Finally develop the strategy model using MATLAB/Simulink, and finish the verification test and prove the control strategy effectiveness by offline simulation.

scholarly journals Control Strategy of Coolant Flow Rate and Temperature of Battery Pack Based on Double Fuzzy Controller

2020 ◽  
Vol 1550 ◽  
pp. 062009
Author(s):  
Yang Zhao ◽  
Hengfu Wang ◽  
Qinkai Zhou ◽  
Yuan Luo ◽  
Meixia Zhang
Keyword(s):  
Flow Rate ◽  
Control Strategy ◽  
Fuzzy Controller ◽  
Coolant Flow ◽  
Battery Pack ◽  
Coolant Flow Rate

scholarly journals Research on a balanced circuit and control strategy

2020 ◽  
Vol 15 (4) ◽  
pp. 607-612
Author(s):  
LingChao Zhang
Keyword(s):  
Single Cell ◽  
Control Strategy ◽  
Lithium Ion ◽  
Battery Pack ◽  
Battery Packs ◽  
In Series ◽  
Equilibrium Process ◽  
The Cost ◽  
And Control ◽  
Balancing Control

Abstract For reducing the inconsistent state of charges (SOC) of lithium-ion battery cells and making the full use of battery packs, effective battery balancing technology should be used. In order to achieve the goal of balancing any single cell in the battery pack expediently and considering the cost and the balance efficiency, a balanced circuit is proposed. By changing the action state of single-pole double-throw relay connected to each of the single cell battery, the balanced single-cell battery is in a state of non-load power supply, at this point, the balanced battery is in `charging’ state compared with other batteries in the battery pack, thus achieving the balance target of the battery pack. On this basis, this paper also proposes a new balancing control strategy; it is different from the traditional control strategy to balance the SOC of the single cell to the SOC average of the battery pack, considering the different SOC change rates of the cells with different capacity in the battery pack. The balanced control strategy proposed in this paper allows the set condition of the single cell to end the equilibrium process in advance so as to reduce the unnecessary balance time and then improve the equilibrium speed. In order to verify the feasibility of the proposed circuit and control strategy, 18 650 batteries with different initial SOC in series are experimentally verified. The experimental results show that the balanced circuit proposed in this paper can well balance the cell of each single cell and make the battery pack reach a balanced state.

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