Gm Global Technolgoy Operations, Inc.

William Osad

Andrew J Galant

Mei Cai

Gongshin Qi

Michael P Balogh

Meinan He

Lei Wang

Anil Bika

Michelle H Wiebenga

Biqiong Wang

Lane G Lindstrom

A dilatometer for measuring battery dilation including: a battery cell with a first electrode and a second electrode; an internal magnetic sensing element; and a magnetic force sensor. The internal magnetic sensing element is configured to move in response to expansion the first electrode and remain stationary in response to expansion of the second electrode during dilation of the battery cell. The magnetic force sensor is stationary relative to the battery cell and configured to sense a change in magnetic force strength between the internal magnetic sensing element and the magnetic force sensor. A controller is configured to measure dilation of the first electrode independent of dilation of the second electrode based on the change in the magnetic force strength between the internal magnetic sensing element and the magnetic force sensor.

Magnetic force dilatometer for measuring dilation of individual electrode

A battery cell monitoring system includes: a battery cell including an electrode stack disposed within a case; a gas sensor disposed within, attached to or connected to the case and configured to detect levels of one or more gases within the case; and a gas monitoring circuit connected to the gas sensor. The gas monitoring circuit includes: a memory that stores data collected from the gas sensor; a transceiver configured to transfer the data to a network device separate from the battery cell; and a control module that monitors the levels of one or more gases and based on the levels of the one or more gases detects (i) an issue with the battery cell during operative use of the battery cell, (ii) an issue with the battery cell during formation of the battery cell, or (iii) completion of a formation operation of the battery cell.

In-situ gas detection and monitoring of battery cells during formation and intended use

Presented are devices for measuring dimensions of tear seams, methods for making/using such devices, and handheld clamp calipers for gauging material thicknesses of tear seams in passenger airbag breakaway panels. A handheld or automated measurement tool for determining seam dimensions includes first and second jaws operatively attached to a calibrated scale. The calibrated scale displays a measurement value fora dimension of a seam. The first jaw includes a first jaw tip projecting from a first jaw mandible. The second jaw includes a second jaw tip projecting from a second jaw mandible, which is movably attached with the first jaw mandible. Each of the jaw tips contacts a respective surface of the seam. An interior edge of the second jaw tip is disposed at an oblique angle of less than 90 degrees from an interior edge of the second jaw mandible.

Systems, methods, and devices for measuring tear seam thicknesses of breakaway panels for vehicle airbags

A method for manufacturing an interfacial lithium fluoride layer for an electrochemical cell that cycles lithium ions is disclosed. In the method, a substrate is positioned in a reaction chamber of an atomic layer deposition reactor and a lithium fluoride (LiF) precursor is introduced into the reaction chamber such that the LiF precursor contacts and chemically reacts with functional groups on the substrate. Then, an oxidant is introduced into the reaction chamber to form a single molecular layer of lithium fluoride on the substrate. The lithium fluoride layer is formed on the substrate at a temperature of greater than or equal to about 110 degrees Celsius to less than or equal to about 250 degrees Celsius.

Method for manufacturing an interfacial lithium fluoride layer for an electrochemical cell

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Macomb, MI, United States of America

William Osad