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 1:
2. 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;
at least one electrical switching means, called reversing switch, configured to produce electrical connections/disconnections, on demand, of one or more accumulators to/from the rest of the pack while ensuring electrical continuities within all of the pack or the rest of the pack, the reversing switch comprising:
at least one rigid electrically conductive blade, comprising two parts inclined relative to one another, the blade being mounted to pivot at its joint between the two parts;
at least two first ferromagnetic parts each forming a magnetic closure plate, inserted respectively into a part of the rigid blade or into one of the busbars;
at least two elements each forming a magnetic lock, each 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; each electrically conductive part being in electrical contact respectively with the busbar or with a part of the rigid blade;
a metal braid linking the rigid blade to one of the busbars;
the reversing switch being configured such that:
j/ when neither of the two coils is initially electrically powered, a magnetic circuit of one of the two locks is in closed initial configuration through its permanent magnet which exerts an attraction torque, defined as being a product between the attraction force and a length of one of the parts of the blade, greater than that of the other permanent magnet which therefore leaves a magnetic circuit of the other of the two locks in open initial configuration with its closure plate away from its permanent magnet;
jj/ when the coil of the initially closed lock is electrically powered by control of one of a plurality of battery management systems in a given direction, the reversing switch produces a magnetic field which opposes that of its permanent magnet, which provokes a reduction of closure torque thereby until the closure torque is lower than the attraction torque exerted by the permanent magnet of the initially open lock, which provokes a switchover by pivoting of the blade and thus the closure of the magnetic circuit of the initially open lock and simultaneously the opening of the magnetic circuit of the initially closed lock, thus producing an electrical disconnection of one or more accumulators while ensuring an electrical continuity within the rest of the pack;
the steps j/ and jj/ being able to be performed reciprocally from the closed lock to revert to the initial configuration by thus producing an electrical reconnection of the accumulator or accumulators to the rest of the pack with an electrical continuity within all of the pack.