当前位置: X-MOL 学术Comput. Chem. Eng. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
MPC strategies based on the equivalent hydraulic model for the fast charge of commercial Li-ion batteries
Computers & Chemical Engineering ( IF 3.9 ) Pub Date : 2020-07-07 , DOI: 10.1016/j.compchemeng.2020.107010
Alejandro Goldar , Raffaele Romagnoli , Luis D. Couto , Alberto Romero , Michel Kinnaert , Emanuele Garone

In this work, we propose and demonstrate two low-computational MPC-based strategies to charge low-capacity commercial Li-ion batteries in the shortest time possible, while limiting the occurrence of degradation mechanisms. To do so, we use a low-complexity electrochemical model (the Equivalent Hydraulic Model, EHM). To reduce the computational burden of the resulting non-convex optimization problem, two approximations of the admissible region are considered: a time-invariant convexification, and a time-varying convex embedding. These approximations are experimentally tested on commercial LCO batteries (Turnigy 160mAh), under controlled ambient temperatures (10, 20, and 30 C) and a non-controlled scenario. They are compared with the Constant Current-Constant Voltage (CCCV) protocol. Experimental results show that the proposed schemes achieve relevant reductions of the charging time with respect to the CCCV in thermal non-controlled and controlled environments. Results also highlight that the time-varying convex embedding does not significantly impact the computational time while further reducing the charging time.



中文翻译:

基于等效水力模型的MPC策略用于商用锂离子电池的快速充电

在这项工作中,我们提出并演示了两种基于MPC的低计算策略,可在尽可能短的时间内为低容量商用锂离子电池充电,同时限制了降解机理的发生。为此,我们使用了低复杂度的电化学模型(等效水力模型,EHM)。为了减少由此产生的非凸优化问题的计算负担,考虑了可允许区域的两个近似值:时不变凸化和时变凸嵌入。这些近似值是在市售LCO电池(Turnigy 160mAh)上在受控环境温度(10、20和 30∘C)和非受控方案。将它们与恒定电流-恒定电压(CCCV)协议进行比较。实验结果表明,在热非受控和受控环境下,相对于CCCV,所提出的方案可实现充电时间的相应减少。结果还强调,时变凸嵌入不会显着影响计算时间,同时可以进一步减少充电时间。

更新日期:2020-07-13
down
wechat
bug