Patent ID: 6741437
Filing Date: 2004-05-25
Classification: H02J

Abstract:
A safety device for a battery of electrical storage cells composed of a plurality of modules connected in series each including at least one storage cell, said device including:at least one individual circuit for individually short circuiting a module if said module should fail and maintaining permanently electrical continuity between the other of said modules connected in series with said module, wherein said at least one individual circuit includes: a first shunt circuit that is connected to two end terminals of said module, and wherein said first shunt circuit includes: an electrical energy consuming member in series with a switching member for applying a shunt to the terminals of said module via said consuming member if the voltage at the terminals of said module is greater than a particular upper voltage threshold value, said at least one individual circuit directly short circuiting the terminals of said module if the voltage at said terminals of said module falls below a particular lower voltage threshold value.