Automotive Cells Company Patente

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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The invention relates to a hopper (6) comprising a hopper body (14) containing powder (16), said hopper body (14) defining an internal housing (24) in which said powder (16) is stored, the hopper (6) further comprising a vibrating device (26), said vibrating device (26) being provided with a vibrating generator (30). The vibrating device (26) is further provided with a shaft (32) coupled to said vibrating generator (30); and is arranged such that the shaft (32) is inserted into powder (16); and the hopper (6) further comprises at least one grid (28A, 28B, 28C) arranged within said housing (24) of the hopper body (14), secured to the shaft (32) and configured to brake powder domes when they occur. The invention further relates to a calendering system (2) comprising two parallel calender rollers (4) and such a hopper (6).

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The collector plate (30) is formed by a thin conductive sheet bent into a first part (30A) and a second part (30B). The collector plate (30) comprises a reinforcing corner rib (42) at the angle between the first part (30A) and the second part (30B).

La cellule (10) comprend un empilement d'éléments électrochimiques (12), comprenant une cathode, une anode, et un séparateur imprégné d'électrolyte intercalé entre l'anode et la cathode, et comportant un boitier de maintien (16) présentant deux faces principales (20) entre lesquelles est comprimé l'empilement d'éléments électrochimiques (12). Chaque face principale (20) présente au moins une plage d'appui (22) faisant saillie vers l'intérieur au voisinage d'au moins un bord de la face principale (20), ladite plage d'appui (22) étant en appui sur l'empilement d'éléments électrochimiques (12).

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A process of managing an electrochemical battery (10) comprising measuring at least one first internal resistance (R_HF(t)) of the battery at at least a first frequency (f₁) and comparing the measured first internal resistance (R_HF(t)) with a first reference internal resistance (R_HF,_REF); if the first measured internal resistance is less than or equal to the first reference internal resistance, making a decision regarding continued use of the battery; and otherwise measuring at least one second internal resistance (R_LF(t)) of the battery at least one second frequency (f₂) lower than the first frequency and comparing a difference D(t) between the measured second and first internal resistances with a reference difference (D_REF) between a second and the first reference internal resistances (R_LF,_REF, R_HF,_REF); and if the difference D(t) is greater than or equal to the reference difference, making a decision regarding a disqualification of the battery (10); and otherwise reducing an intensity of a fast charge and/or regeneration current for a subsequent charging step.

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