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1. (US20190267677) APPARATUS AND METHOD FOR DETECTION OF DEFORMATION IN BATTERY CELLS

Office : United States of America
Application Number: 16285294 Application Date: 26.02.2019
Publication Number: 20190267677 Publication Date: 29.08.2019
Publication Kind : A1
IPC:
H01M 10/42
G01B 3/18
G01B 5/30
H ELECTRICITY
01
BASIC ELECTRIC ELEMENTS
M
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10
Secondary cells; Manufacture thereof
42
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
G PHYSICS
01
MEASURING; TESTING
B
MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
3
Instruments as specified in the subgroups and characterised by the use of mechanical measuring means
18
Micrometers
G PHYSICS
01
MEASURING; TESTING
B
MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
5
Measuring arrangements characterised by the use of mechanical means
30
for measuring the deformation in a solid, e.g. mechanical strain gauge
CPC:
G01B 5/30
H01M 10/4285
G01B 3/18
Applicants: Tesla, Inc.
Inventors: Michael Kahn
Priority Data:
Title: (EN) APPARATUS AND METHOD FOR DETECTION OF DEFORMATION IN BATTERY CELLS
Abstract: front page image
(EN)

A deformation detection apparatus includes a cell movement-control assembly to handle a linear motion and a rotational motion of a battery cell, a body that supports the cell movement-control assembly, a digital micrometer, and control circuitry. The control circuitry controls a displacement of the battery cell between a first position and a second position along a longitudinal axis through a scanning region of the digital micrometer and a plurality of rotational positions of the battery cell at a plurality of charge states and a plurality of discharge states. The control circuitry measures a plurality of outer diameter values of the battery cell for a plurality of linear positions and a plurality of rotational positions along the longitudinal axis of the battery cell and determines a change in a geometrical shape (deformation and/or strain) of the battery cell for the plurality of linear positions and the plurality of rotational positions.