Patent ID: 11923520
Assignee: COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A battery pack comprising:
a plurality of electrochemical batteries or accumulators linked in electrical series and/or parallel to one another by means of a plurality of electrically conductive connecting bars, called busbars;
one or more electronic control systems each suitable for charging and monitoring states of at least a part of the plurality of accumulators; and
at least one electrical switching means, called simple switching means, configured to produce electrical connections/disconnections, on demand, of one or more accumulators to/from the rest of the pack, the simple switching means comprising:
at least one flexible electrically conductive blade, fixed at one of its ends to a fixing point,
at least one first ferromagnetic part forming a magnetic closure plate, inserted respectively into the flexible blade or into one of the busbars, and
at least one element forming a magnetic lock, comprising an electrically conductive part around or within which is housed a permanent magnet and an electrically conductive wire which is wound forming a coil configured to generate a magnetic field parallel to the magnetic field of the permanent magnet; the electrically conductive part being in electrical contact respectively in one of the busbars or in the flexible blade,
the simple switching means being configured such that:
i/ when the coil of a magnetic lock is electrically powered by control of one of a plurality of battery management systems in a given direction, the simple switching means produces a magnetic field which, together with that of the permanent magnet, generates an attraction or repulsion force greater than a mechanical force of the flexible blade, which provokes convergence or separation of the closure plate with respect to its permanent magnet, thus producing an electrical connection or disconnection of one or more accumulators;
ii/ when the coil of the magnetic lock is no longer electrically powered, the magnetic force of the permanent magnet is greater than the mechanical force of the flexible blade, which maintains the electrical contact or the separation between the flexible blade and one of the busbars and thus the electrical connection or disconnection of the accumulator or accumulators; and
iii/ when the coil of the magnetic lock is electrically powered by the control of the one battery management system in a direction opposite to that given, the simple switching means produces a magnetic field opposite to that of the step i/, to a point of obtaining an attraction or repulsion force lower than the mechanical force of the flexible blade, which provokes the separation or the convergence of the closure plate of the magnetic lock with respect to its permanent magnet and therefore the opening or the closing of a magnetic circuit and the breaking or the making of the electrical contact between the flexible blade and one of the busbars, thus producing an electrical disconnection or reconnection of the accumulator or accumulators from or to the rest of the pack.