Fully printable integrated multifunctional sensor arrays for intelligent lithium-ion batteries.

Area of Science:

• Materials Science
• Electrochemistry
• Sensor Technology

Background:

• Current battery risk management lacks timely indicators due to complex cell chemistries.
• Ensuring battery pack safety requires advanced health monitoring and hazard prediction.

Purpose of the Study:

• To develop an intelligent monitoring system for lithium-ion batteries.
• To provide timely warnings and indicators for various battery degradation and failure modes.

Main Methods:

• Integrating a conformal array of multifunctional sensors into battery packing foil using nano-fabrication with sensing inks.
• Utilizing operando thermal, mechanical, and chemical sensing.
• Incorporating sensors for flammable gases and electrolyte leakage.

Main Results:

• The printed sensing arrays offer minimal weight increase (49 mg), high resilience, and long-term stability.
• Operando data provide quantitative indicators for degradation issues like over-discharge, Li-plating, short circuits, and thermal abuse.
• Real-time detection of flammable gases and electrolyte leakage triggers immediate alarms.

Conclusions:

• The developed sensor platform enhances lithium-ion battery safety through intelligent monitoring and early warnings.
• This universal platform is applicable to various battery types and pack levels for advanced energy storage management.