Saft

Psa Automobiles Sa

Centre National De La Recherche Scientifique

Sorbonne Université

Institut Polytechnique De Grenoble

Université Paris-Saclay

Centralesupelec

Stellantis Auto Sas

David Herpe

Francis Roy

Thomas Peuchant

Eric Laboure

Franck Castejon

Jean Claude Leprêtre

Pierre Xavier Thivel

Gentien Thorner

Jean Bernard Douet

The invention relates to a device forming a DC voltage bus for a polyphase electrical system (M), comprising voltage legs (A, A, A) each having a plurality of battery cell modules (C, C, C), each module comprising a battery cell or a cluster of battery cells (c), connected to a DC-to-AC converter (DCAC); said battery cell modules (C, C, C) being connected together in series via the DC-to-AC converter (DCAC); said voltage legs (A, A, A) each being connected to a specific phase leg (B, B, B) for said polyphase electrical system (M), at least one phase leg (B, B, B) having a branch (D, D, D) connected to a rectifier module (R). The invention also relates to a motor vehicle, a renewable energy generator and a method based on such a system.

Device for creating a DC voltage bus for a polyphase electrical system, motor vehicle and renewable energy generator comprising such a device

The present invention relates to a method for charging an electrochemical cell of a rechargeable battery with charging pulse control (PL), the pulses (PL) being driven in voltage control mode in the form of voltage steps (Pt) of variable amplitude. According to the invention, the method consists in calculating the value (Ut+1) of each voltage step (Pt+1) with respect to the value (Ut) of the preceding voltage step (Pt) and according to a progression variable representative of the variation in the internal resistance of the cell (d(R)/dt), for a period ending on the preceding step (Pt), with respect to a predetermined tolerated variation threshold (&#x3b1;), where Var=d(R)/dt&#x2212;&#x3b1;. The method applies to high-voltage electric battery charging protocols for electromobility or stationary applications, or portable device batteries, for example.

Method for pulse charging in voltage control mode with steps of variable amplitude

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Tresses, France

David Herpe