Systems for preforming acoustic measurement of batteries
Aspects of the present disclosure are directed to a suite of testing apparatuses and non-destructive, acoustic inspection methods for scanning and inspecting batteries to determine and characterize various physical phenomena in these batteries. In one aspect, a rastering system for non-invasive and acoustic inspection of battery cells includes a holder for placing a battery cell inside the system for the acoustic inspection, at least one transducer configured to perform acoustic measurements on the battery cell, and a controller configured with inspection parameters for performing the acoustic measurements, the inspection parameters being dynamic and interchangeable depending on at least one or more of a shape, a size, and a form factor of the battery cell.
1 . A rastering system for non-invasive and acoustic inspection of battery cells, the system comprising:
a holder for placing a battery cell inside the system for the acoustic inspection;
at least one transducer configured to perform acoustic measurements on the battery cell;
and a controller configured to:
receive inspection parameters for performing the acoustic measurements, the inspection parameters being tailored to correspond to one or more of a shape, a size, and a form factor of the battery cell,
control the holder and the at least one transducer to perform the acoustic measurements according to the inspection parameters,
analyze the acoustic measurements to extract acoustic features indicative of physical characteristics of the battery cell; and
generate an aggregated map of the acoustic measurements based on the acoustic features extracted.
2 . The rastering system of claim 1 , wherein the rastering system is configured for inspection of cylindrical battery cells and the battery cell is a cylindrical battery cell.
3 . The rastering system of claim 2 , wherein the at least one transducer is configured to move vertically along a curved surface of the battery cell at each angle of rotation of the battery cell to transmit and receive acoustic signals through the battery cell.
4 . The rastering system of claim 3 , wherein the at least one transducer is configured to obtain, based on the acoustic signals received, the acoustic measurements along an axial surface of the battery cell at each angle of rotation of the battery cell.
5 . The rastering system of claim 4 , wherein the controller is configured to analyze the acoustic measurements and generate the aggregated map at each angle of rotation of the battery cell.
6 . The rastering system of claim 2 , further comprising:
one or more rollers configured to rotate the battery cell at a predetermined angle of rotation until an entire curved surface of the battery cell is acoustically measured.
7 . The rastering system of claim 6 , wherein the at least one transducer is an array of transducers packaged in a cylindrical unit to transmit and receive acoustic signals through an axial surface of the battery cell at each predetermined angle of rotation.
8 . The rastering system of claim 6 , wherein, after each rotation of the battery cell by the one or more rollers, the at least one transducer is configured to obtain acoustic measurements along an axial surface of the battery cell to yield the acoustic measurements.
9 . The rastering system of claim 1 , wherein the controller is configured to output at least one of a result of analyzing the acoustic measurements and the aggregated map.
10 . The rastering system of claim 9 , wherein the at least one transducer is configured to perform one or more of single-sided and a double-sided measurement of the battery cell.
11 . The rastering system of claim 10 , wherein the at least one transducer is a roller transducer.
12 . The rastering system of claim 1 , wherein the rastering system is configured for inspection of rectangular battery cells and the battery cell is a rectangular battery cell.
13 . The rastering system of claim 12 , wherein the battery cell is a flat cell.
14 . The rastering system of claim 12 , wherein the controller is configured to control a movement of the at least one transducer in at least one of two directions to perform a plurality of distinct acoustic measurements across an entire curved surface of the battery cell.
15 . The rastering system of claim 14 , wherein the controller is configured to output at least one of the aggregated map and a result of analyzing the plurality of acoustic measurements.
16 . The rastering system of claim 1 , wherein the inspection parameters specify a plurality of ultrasound tests from among which an ultrasound test may be applied for performing the acoustic measurements.
17 . The rastering system of claim 16 , wherein the plurality of ultrasound tests include Pulse/Echo, Pitch Catch & Through Transmission, and Beam Steering & Phase Array Applications.