Automotive Cells Company

A current collector (12) for connecting two components (14, 16) of a battery cell, namely a set of electrode tabs (14) and a terminal foot (16), comprises a sheet metal piece having a first wing (20), a second wing (22) and at least one fold portion (24) linking the first wing (20) to the second wing (22). The first wing (20) has a first flat face (30) located in a first plane (200), the second wing (22) has a second flat face (36) located in a second plane (300), the fold portion (24) defines a fold axis (100) which is parallel to the first flat face (30) and to the second flat face (36), the first flat face (30) is oriented in a first rotation direction (110) about the fold axis (100) and the second flat face (36) is oriented in a second rotation direction (120) about the fold axis, opposed to the first rotation direction (110). The fold portion (24) is entirely located on one side of the first plane (200) oriented in the second rotation direction (120) and crosses the second plane twice (300).

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The invention relates to a method for monitoring a Li-ion battery pack (10) comprising battery cells (14), a Li-ion battery module (12) comprising battery cells (14), or a Li-ion battery cell (14), each cell (14) comprising negative active material with a silicon-based material, the method comprising charging and using the pack or module or cell, said using leading to a discharge. The method comprises: - measuring the voltage of each cell and/or pack and/or module during the discharge, - generating an electrochemical profile during the discharge, the electrochemical profile representing the voltage depending on the capacity and being calculated from the measured voltage(s), - determining from the electrochemical profile the contribution of the silicon-based material to said electrochemical profile, and - detecting an early indicator of imminent lithium plating based on the determined contribution.

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L'ensemble d'interconnexion (10, 100, 200) comprend un premier composant (12) qui est une cellule électrochimique (18) ou un module de batterie comprenant au moins une cellule électrochimique (18), un deuxième composant (14), et une première pièce de connexion (16) comprenant une première portion de fixation (30) connectée à une borne de connexion électrique (28) du premier composant (12) et une deuxième portion de fixation (32) reliées par une portion de liaison (34).La portion de liaison (34) est plus souple que la première portion de fixation (30) et que la deuxième portion de fixation (32) en flexion, la première portion de fixation (30) étant mobile par rapport au premier module (12) entre une position pliée et une position dépliée par pliage, ou réciproquement dépliage, de la portion de liaison (34).

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A battery module (10) comprises two parallel end plates (12) and one or more rows of cells (16) extending in a longitudinal direction (100) of the battery module (10) perpendicular to the two parallel end plates (12), each of the one or more rows of cells (16) comprising a series of prismatic battery cells (20, 22) and thermal insulation spacers (24, 26) repeated alternately along the longitudinal direction (100). At least one of the thermal insulation spacers (24, 26) is made of a state transition material, which exhibits an initial thermal conductivity higher than an initial thermal conductivity threshold (TCT1) at temperatures below 200°C and, when exposed to temperatures higher than a transition temperature (TT) between 220°C and 320°C, undergoes an irreversible transformation which results in a post-transformation thermal conductivity lower than a post-transformation thermal conductivity threshold (TCT2) that is less than the initial thermal conductivity threshold minus 0.5 Wm^-1K^-1, and less than 0.28 Wm^-1K^-1.

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …