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World Electric Vehicle Journal is published by MDPI from Volume 9 issue 1 (2018). Articles in this Issue were published by The World Electric Vehicle Association (WEVA) and its member the European Association for e-Mobility (AVERE), the Electric Drive Transportation Association (EDTA), and the Electric Vehicle Association of Asia Pacific (EVAAP). They are hosted by MDPI on mdpi.com as a courtesy and upon agreement with AVERE.
Open AccessArticle

Safe Li-Ion Technology for Micro and Mild Hybrid application based on CEA Bipolar LiFePO4/Li4Ti5O12 technology

M. Chami Commissariat à l'Energie Atomique – Direction de la Recherche Technologique, 17, rue des Martyrs – 38054 Grenoble Cedex 9 - FRANCE
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World Electr. Veh. J. 2009, 3(4), 735-739; https://doi.org/10.3390/wevj3040735
Published: 25 December 2009
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Abstract

The bipolar design consists on identical cells which are stacked together. This technology offers several advantages because it simplifies cell-to-cell connections and so offers a lowering internal resistance for the whole battery. The bipolar battery can be designed to present a large capacity, a high voltage and an appreciable flexible form factor.
The patented bipolar battery developed in CEA for the Hybrid Electric Vehicle (HEV) is based upon the use of Li4Ti5O12 as anode material (allowing the use of a common bipolar aluminium current collector, and high power application) and LiFePO4 (cycle life, safety, low cost). The main target has been first to achieve a sealed system with no electrolyte leakage, and then to demonstrate the advantage of the Li4Ti5O12 / LiFePO4 couple (1.9V) for high power Li-ion bipolar battery. To increase the battery cycle life, a new design has been elaborated and has allowed to develop standard energy battery of 15Wh (24V, 0.65 Ah).
In this paper, first results on 15Wh cells, using the Li4Ti5O12 / LiFePO4 couple and a new bipolar battery design, will be presented according HEV profiles.
Keywords: Battery; Lithium-ion; bipolar; Power; Safety; High cycle life; Low cost Battery; Lithium-ion; bipolar; Power; Safety; High cycle life; Low cost
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Chami, M.; Mailley, S.; Reynier, Y.; Masse, F.; Martinet, S.; Fusalba, F. Safe Li-Ion Technology for Micro and Mild Hybrid application based on CEA Bipolar LiFePO4/Li4Ti5O12 technology. World Electr. Veh. J. 2009, 3, 735-739.

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