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Caractérisation et optimisation d'une batterie électromécanique sous chargement cyclique

Abstract : This work takes place into a multidisciplinary project, gathering mechanical and electromechanical specialists, with the aim to design a 3kWh household electromechanical battery module. The energy is stored as kinetic one in a flywheel. The main characteristics of this battery are a high yield, a long life duration and a minimal discharge time over one hour. At a low cost, it could be used in conjunction with alternative electric sources and to secure and regulate home current supplies and consumption. Following a literature review of the available technologies, the flywheel similitude properties are demonstrated and capabilities design coefficients are defined taking into account the stress cycles. In order to define criterions to choose the flywheel material and geometry, the results are applied to the major literatures configurations including metals, composites or ceramics. They are brought together as graphical maps and, using optimal solution surfaces, they show the compromises between the design criterions such as specific energy, energy density, maximal rotational velocity and cost. A single suited structure is then defined which integrates into the flywheel some parts of the motor-generator and of the magnetic bearings. A global design process is conducted taking into account the specific properties and the interactions between the components. The geometry of the motor-generator rotor is optimised then, improving the battery performances. The feasibility of an autofrettage process is proposed showing that endurance limit depends on flywheel slenderness. The build prototype is finally presented.
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https://tel.archives-ouvertes.fr/tel-01806296
Contributor : Corentin Kerzreho <>
Submitted on : Friday, June 1, 2018 - 7:17:29 PM
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  • HAL Id : tel-01806296, version 1

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Corentin Kerzreho. Caractérisation et optimisation d'une batterie électromécanique sous chargement cyclique. Mécanique des structures [physics.class-ph]. Ecole Normale Supérieure de Cachan, 2002. Français. ⟨tel-01806296⟩

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