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Flow simulation and analysis of high-power flow batteries

Journal Article · · Journal of Power Sources
 [1];  [2];  [3];  [4];  [1]
  1. Bosch Research and Technology Center, Palo Alto, CA (United States)
  2. Dept. of Energy (DOE), Washington DC (United States). Advanced Research Projects Agency-Energy (ARPA-E)
  3. Northern Illinois Univ., DeKalb, IL (United States). Dept. of Mechanical Engineering
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
The cost of a flow battery system can be reduced by increasing its power density and thereby reducing its stack area. If per-pass utilizations are held constant, higher battery power densities can only be achieved using higher flow rates. Here, a 3D computational fluid dynamics model of a flow battery flow field and electrode is used to analyze the implications of increasing flow rates to high power density operating conditions. Interdigitated and serpentine designs, and cell sizes ranging from 10 cm2 to 400 cm2, are simulated. The results quantify the dependence of pressure loss on cell size and design, demonstrating that the details of the passages that distribute flow between individual channels and the inlet and outlet have a major impact on pressure losses in larger cells. Additionally, in-cell flow behavior is analyzed as a function of cell size and design. Flow structures are interrogated to show how and where electrode parameters influence pressure drops, and how regions where transport is slow are correlated with the presence of experimentally observed cell degradation.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE; USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Grant/Contract Number:
AC02-05CH11231; AR0000137
OSTI ID:
1506247
Alternate ID(s):
OSTI ID: 1253214
Journal Information:
Journal of Power Sources, Journal Name: Journal of Power Sources Journal Issue: C Vol. 299; ISSN 0378-7753
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Comparing velocities and pressures in redox flow batteries with interdigitated and serpentine channels journal February 2019
A Review of Hydrogen/Halogen Flow Cells journal May 2016
Rechargeable redox flow batteries: flow fields, stacks and design considerations journal January 2018
The Effect of Interdigitated Channel and Land Dimensions on Flow Cell Performance journal January 2018

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