Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (10): 3209-3220.doi: 10.19799/j.cnki.2095-4239.2022.0093

• Energy Storage System and Engineering • Previous Articles     Next Articles

Numerical simulation of a novel radial all-vanadium flow battery cell

Mengyao QI(), Yichen HOU, Lei CHEN(), Lijun YANG   

  1. North China Electric Power University, Beijing 102206, China
  • Received:2022-02-22 Revised:2022-03-15 Online:2022-10-05 Published:2022-10-10
  • Contact: Lei CHEN E-mail:15128164563@163.com;Leichen@ncepu.edu.cn

Abstract:

All-vanadium redox flow batteries are widely used in the field of large-scale energy storage because of their freedom of location, high efficiency, long life, and high safety. The existing battery, on the other hand, has a single structure and cannot meet the needs of the rapidly developing energy storage field. A numerical simulation method is used to establish a mathematical and physical model for the coupling of electrochemical reactions and heat and mass transfer inside the battery cell to achieve the new radial flow all-vanadium flow battery cells. The distribution law of multi-physics coupling transport characteristics is obtained for different inlet quantities. Ion concentration field, electrolyte velocity field, voltage drop, and electric potential distribution law are all included. The results show that optimizing the number of electrolyte inlets can effectively improve electrolyte transport performance in porous electrodes, improve the uniformity of the ion concentration distribution in porous electrodes, weaken ion concentration polarization, increase the electrode potential, and enhance the battery performance. Simultaneously, the electrolyte distribution channel is set at the electrolyte flow inlet, thereby effectively reducing electrolyte flow resistance, improving electrolyte distribution uniformity, and improving battery performance. The simulation research results can be used to optimize the design of a flow battery.

Key words: all-vanadium flow battery, radial flow all-vanadium flow battery, electrochemical energy storage, heat and mass transfer, numerical simulation

CLC Number: