Saft

Saft Group Sa

Saft Groupe Sa

Philippe Borel

Patrick Bernard

Gerard Rigobert

Cécile Tessier

Dominique Ligeois

Mélanie Dendary

Erwan Dumont

Yannick Toret

Alexandre Chaillet

Laure Le-Guenne

Emmanuelle Garitte

Dinh An Nguyen

Laure Le Guenne

Gérard Rigobert

The present invention relates to a battery comprising: -i) at least two electrochemical elements (d) connected to one another by a connection part (c), each electrochemical element comprising a container, -ii) a material arranged between said at least two electrochemical elements, and -iii) at least one disconnection device, said device comprising: a heat-activatable element (a) able to deform when its temperature reaches a threshold value, the heat-activatable element being arranged such that, when its temperature reaches said threshold value, it disconnects the connection part (c) from at least one electrochemical element (d) through its deformation, said heat-activatable element not contributing to the conduction of electric current when an electric current flows through said electrochemical elements, said heat-activatable element being placed in contact with the connection part (c) and with a current output terminal.

Disconnection device comprising a heat activatable element

The invention relates to an electrochemical element and a battery comprising one or more electrochemical elements, with integrated sensors and/or actuators, in particular including an application for monitoring the operation of an electrochemical element or a Li-ion battery, and/or triggering actions in such an element or such a battery, intended to secure the element or the battery. The electrochemical element () comprises a closed shell () defining an internal volume and a beam () arranged therein having alternating positive and negative electrodes respectively connected to two positive and negative electrical output terminals housing separators, the beam () being impregnated with electrolyte and further connected by connection means () to one () of the electrical output terminals. It further comprises one or mote self-powered sensor and/or actuator elements (to) each arranged in contact with one component selected from the shell (), the beam (), the connection means (), and the output terminal (), and capable of measuring a physical or chemical magnitude relative to, and/or generating a physical action or effect on, the surroundings thereof.

Electrochemical cell and battery with integrated sensor and/or actuator

A lithium accumulator including: a current collector; a stack of at least two layers arranged on at least one surface of the current collector, wherein a first layer is in contact with the surface of the current collector and includes a mixture of at least two compounds selected from a lithiated manganese phosphate, a lithiated transition metal oxide, and a lithiated spinel-type manganese oxide; and an outer layer including an active material having at least 90% of a lithiated iron phosphate.

Positive electrode for lithium accumulator

A safety current interrupter device for a rechargeable cell is provided comprising a deformable material () adapted to deform when the temperature reaches a threshold value, a deformable membrane () adapted to deform under the effect of pressure and/or deformation of the deformable material (), and an electrically conductive link member (), adapted to break as a result of the deformation of the deformable membrane ().

Thermo-mechanically activated current interrupter

Growing community of inventors

Bruges, France

Philippe Borel