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US 12,384,085 B2Granted
System and method for ultrasonic inspection of resin fill level in a battery module
AssigneeLG Energy Solution, Ltd.
InventorsWonseok Choi, Jaehyun Bae, Kangil Lee, Nahee Oh
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Abstract
An ultrasonic inspection system determines whether or not a thermally conductive resin forming a thermally conductive resin layer is filled through a waveform change of an ultrasonic wave measured by transmitting the ultrasonic wave toward a portion of an edge of a bottom surface of a module frame from the outside. An ultrasonic sensor at one of two opposite edges of an exterior surface of the bottom surface of the module frame determine a height of the resin within the battery module.
Claims5
An ultrasonic inspection system, comprising:
- a battery module comprising:
- a battery cell stacked body in which a plurality of battery cells are stacked;
- a module frame accommodating the battery cell stacked body;
- a thermally conductive resin layer formed by liquid-injecting a thermally conductive resin between a lower end of the battery cell stacked body and a bottom surface of the module frame;
- and
- at least one ultrasonic sensor at one of two opposite edges of an exterior surface of the bottom surface of the module frame,
- wherein the at least one ultrasonic sensor determines the thermally conductive resin forming the thermally conductive resin layer is filled through a waveform change of an ultrasonic wave measured by transmitting the ultrasonic wave toward a portion of an edge of the bottom surface of the module frame from outside of the module frame,
- wherein the at least one ultrasonic sensor is a plurality of the ultrasonic sensors,
- wherein the plurality of ultrasonic sensors is disposed at both of the two opposite edges of the bottom surface of the module frame,
- wherein the thermally conductive resin layer is formed by liquid-injecting the thermally conductive resin through at least one liquid-injection hole formed in the bottom surface of the module frame,
- wherein the at least one liquid-injection hole is a plurality of liquid-injection holes,
- wherein the plurality of liquid-injection holes is arranged in a central portion of the bottom surface of the module frame, and
- wherein the plurality of ultrasonic sensors is spaced apart from the plurality of liquid-injection holes.
10 more elements
An ultrasonic inspection method, comprising:
- liquid-injecting a thermally conductive resin through at least one liquid-injection hole formed in a bottom surface of a module frame;
- stopping the liquid-injecting of the thermally conductive resin and disposing at least one ultrasonic sensor on one portion of one of two opposite edges of the bottom surface of the module frame;
- transmitting an ultrasonic wave into the bottom surface of the module frame through the ultrasonic sensor;
- and
- determining whether the thermally conductive resin is filled according to a waveform of the ultrasonic wave,
- wherein the at least one ultrasonic sensor is a plurality of the ultrasonic sensors,
- wherein the plurality of ultrasonic sensors is disposed at both of the two opposite edges of the bottom surface of the module frame,
- wherein a thermally conductive resin layer is formed by liquid-injecting the thermally conductive resin through at least one liquid-injection hole formed in the bottom surface of the module frame,
- wherein the at least one liquid-injection hole is a plurality of liquid-injection holes,
- wherein the plurality of liquid-injection holes is arranged in a central portion of the bottom surface of the module frame, and
- wherein the plurality of ultrasonic sensors is spaced apart from the plurality of liquid-injection holes.
8 more elements
Dependencies are inferred from the claim text.