Pressure Sensor to Detect Battery Damage

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The prediction of future failure, either gradual or catastrophic, is an important need in many applications that employ Li-ion battery technology. Failure prediction in Li-ion batteries is currently based on visual inspection or the measurement of global properties such as overall cell voltage, current, etc. However, these techniques are ineffective for detecting early localized damage in an individual cell because these qualities are averaged over all of the electrochemically active parts of the cell. New detection techniques are needed in order to better detect current defects and predict future failures.

Researchers at Purdue University have developed a 2D pressure sensor that can directly determine the state-of-charge in Li-ion batteries as well as sense levels of damage that would go undetected using traditional inspection techniques. Using a 2D pressure sensor, this technology can detect very mild damage before it propagates throughout a cell, even while the battery is still operating within its design specifications. Such damage could be the result of mechanical trauma or overcharging and would be undetectable by traditional damage detection techniques until performance was negatively impacted. This technology allows for the prediction of future failure well before it has become an operational issue, allowing appropriate action to be taken.

Advantages:
-Advanced damage detection
-Detects very mild damage well before it can spread throughout a cell

Potential Applications:
-Sensors
-Li-ion batteries
May 21, 2014
NATL-Patent
United States
9,608,299
Mar 28, 2017

Jun 8, 2012
PCT-Patent
WO
(None)
(None)

Jun 8, 2011
Provisional-Patent
United States
(None)
(None)
Purdue Office of Technology Commercialization
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West Lafayette, IN 47906

Phone: (765) 588-3475
Fax: (765) 463-3486
Email: otcip@prf.org