Gm Global Technolgoy Operations, Inc.

Daad B Haddad

Michael P Balogh

Zhongyi Liu

Ratandeep S Kukreja

Bin Hu

Shaomao Xu

Nancy L Johnson

Haijing Liu

Zhiqiang Yu

James R Salvador

Robert D Schmidt

Ryan Curtis Sekol

Nicholas W Pinto

Erik Damon Huemiller

Julie A Swartz

Nicholas P Irish

Peng Lu

Andrew J Galant

Tengjiao Qi

William Osad

Nicholas Paul William Pieczonka

Misle M Tessema

James R Salavador

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

Aspects of the disclosure include leveraging an X-ray fluorescence (XRF) mapping of copper current collectors for non-contact, non-destructive, in-line quality inspections of thin lithium metal anodes. An exemplary method can include receiving an electrode at a detection surface of the XRF detector. The electrode can include the lithium anode on a surface of a current collector. X-rays are passed through the lithium anode and into the current collector and the intensity of characteristic radiation returning from the current collector is measured at the XRF detector. A lithium anode characteristic can be inferred based on the measured intensity of characteristic radiation from the current collector.

X-ray fluorescence (XRF) mapping for anode inspection

A quality control system in a battery manufacturing process includes two or more capacitive measurement apparatuses to obtain a capacitance measurement from two or more intermediate products generated during the battery manufacturing process. The system also includes processing circuitry to obtain the capacitive measurement from the two or more capacitive measurement apparatuses, to determine a characteristic of the corresponding intermediate product, and to control at least one process of the battery manufacturing process that produced at least one of the two or more intermediate products based on the characteristic.

Capacitance-based quality monitoring and control in battery manufacturing

An aluminum-iron alloy for casting includes aluminum, iron, silicon, and niobium present in the aluminum-iron alloy in an amount according to formula (I): (AlFeSi)+x Nb, wherein x is from 0.25 parts by weight to 2.5 parts by weight based on 100 parts by weight of the aluminum-iron alloy. A method of forming a component including forming the aluminum-iron alloy is also described.

Aluminum alloy for casting and method of forming a component

Methods of pretreating an electroactive material comprising lithium titanate oxide (LTO) include contacting a surface of the electroactive material with a pretreatment composition. In one variation, the pretreatment composition includes a salt of lithium fluoride salt selected from the group consisting of: lithium hexafluorophosphate (LiPF), lithium tetrafluoroborate (LiBF), and combinations thereof, and a solvent. In another variation, the pretreatment composition includes an organophosphorus compound. In this manner, a protective surface coating forms on the surface of the electroactive material. The protective surface coating comprises fluorine, oxygen, phosphorus or boron, as well as optional elements such as carbon, hydrogen, and listed metals, and combinations thereof.

Methods to stabilize lithium titanate oxide (LTO) by surface coating

In an embodiment, a high temperature component comprises an aluminum iron alloy. The aluminum iron alloy comprises 52 to 61 atomic percent of aluminum based on the total atoms of aluminum and iron and comprises a first, B2 phase comprising FeAl and a second, triclinic phase comprising FeAl. The aluminum iron alloy can comprise an additional element, for example, at least one of silicon or zirconium.

Aluminum iron alloy having at least two phases

A method of manufacturing a crystalline aluminum-iron-silicon alloy and a crystalline aluminum-iron-silicon alloy part. An aluminum-, iron-, and silicon-containing composite powder is provided that includes an amorphous phase and a first crystalline phase having a hexagonal crystal structure at ambient temperature. The composite powder is heated at a temperature in the range of 850&#xb0; C. to 950&#xb0; C. to transform at least a portion of the amorphous phase into the first crystalline phase and to transform the composite powder into a crystalline aluminum-iron-silicon (Al&#x2014;Fe&#x2014;Si) alloy. The first crystalline phase is a predominant phase in the crystalline Al&#x2014;Fe&#x2014;Si alloy.

Method of manufacturing a crystalline aluminum-iron-silicon alloy

Al&#x2014;Fe&#x2014;Si alloys having optimized properties through the use of additives are disclosed. In some aspects, an alloy includes aluminum in a first amount, iron in a second amount, silicon in a third amount, and an additive in a fourth amount. The additive is selected from the group consisting of a non-metal additive, a transition-metal additive, a rare-metal additive, and combinations thereof. The first amount, the second amount, the third amount, and the fourth amount produce an alloy with a stoichiometric formula (AlA)FeSi where A is the additive.

Aluminum iron silicon alloys having optimized properties

A method of determining a thickness of a submicron carbon of a carbon-coated metal base plate that includes conducting Raman spectroscopy at a target location of the carbon-coated metal base plate to obtain a Raman shift spectrum for the target location. The Raman shift spectrum obtained at the target location is then converted into a calculated thickness of the submicron carbon coating at the target location. The conversion of the Raman shift spectrum into the calculated thickness of the submicron carbon coating at the target location may involve referencing a linear correlation that has been established over the defined wavenumber range between (1) an integrated intensity of a Raman carbon signal obtained from each of a series of reference plates that includes a submicron carbon coating having a verified thickness and (2) the verified thicknesses of the submicron carbon coatings of the series of reference plates.

Determining the thickness of a submicron carbon coating on a carbon-coated metal base plate using Raman spectroscopy

A method of soldering a shape memory alloy (SMA) element to a component includes positioning a tinned end of the SMA element with respect to a surface of the component, and then directly soldering the tinned end to the surface using solder material having a low liquidus temperature of 500&#xb0; F. or less when an oxide layer is not present on the SMA element. The end may be soldered using lead-based solder material at a higher temperature when an oxide layer is present. The end may be tinned with flux material containing phosphoric acid or tin fluoride prior to soldering the SMA element. The SMA element may be submersed in an acid bath to remove the oxide layer. The solder material may contain tin and silver, antimony, or zinc, or other materials sufficient for achieving the low liquidus temperature. Heat penetrating the SMA element is controlled to protect shape memory abilities.

Growing community of inventors

Sterling Heights, MI, United States of America

Daad B Haddad