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Energies 2016, 9(5), 350;

Development of Integrally Molded Bipolar Plates for All-Vanadium Redox Flow Batteries

Advanced Institute of Manufacturing with High-tech Innovations and Department of Mechanical Engineering, National Chung Cheng University, No. 168, University Rd., Minhsiung Township, Chiayi 62102, Taiwan
Institute of Nuclear Energy Research, Atomic Energy Council, No. 1000 Wenhua Rd., Jiaan Village, Longtan Township, Taoyuan 32546, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Xiaoliang Wei
Received: 20 February 2016 / Revised: 26 April 2016 / Accepted: 29 April 2016 / Published: 7 May 2016
(This article belongs to the Special Issue Redox Flow Batteries)
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All-vanadium redox flow batteries (VRBs) are potential energy storage systems for renewable power sources because of their flexible design, deep discharge capacity, quick response time, and long cycle life. To minimize the energy loss due to the shunt current, in a traditional design, a flow field is machined on two electrically insulated frames with a graphite plate in between. A traditional bipolar plate (BP) of a VRB consists of many components, and thus, the assembly process is time consuming. In this study, an integrally molded BP is designed and fabricated to minimize the manufacturing cost. First, the effects of the mold design and injection parameters on frame formability were analyzed by simulation. Second, a new graphite plate design for integral molding was proposed, and finally, two integrally molded BPs were fabricated and compared. Results show that gate position significantly affects air traps and the maximum volume shrinkage occurs at the corners of a BP. The volume shrinkage can be reduced using a large graphite plate embedded within the frame. View Full-Text
Keywords: all-vanadium redox flow battery (VRBs); bipolar plate (BP); injection molding; energy storage all-vanadium redox flow battery (VRBs); bipolar plate (BP); injection molding; energy storage

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Chang, C.-H.; Chou, H.-W.; Hsu, N.-Y.; Chen, Y.-S. Development of Integrally Molded Bipolar Plates for All-Vanadium Redox Flow Batteries. Energies 2016, 9, 350.

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