Temperature Gradients in Li-ion Cell Degradation and Thermal Stability
Abstract
Approved for Public ReleaseTemperature Gradients in Li-ion Cell Degradation and Thermal ManagementDespite the reliance of the Navy o,n lithium-ion batteries (LIBs) to power unmanned underwater vehicles (UUVs), the poor performance of cells in the low temperature en,vironments seriously limits the speed and range of UUV operation. Thus, research efforts which facilitate the deployment of undersea, charging stations are crucial for realizing the full potential of UUVs for mine counter measure and forward scouting missions. When, charging at low temperatures, LIBs suffer from sluggish reaction kinetics and ionic transport processes. This causes excess heat ge,neration and may facilitate the growth of hazardous lithium dendrites in the system. Battery thermal management systems must be opti,mized to balance the need for uniform thermal field within the battery pack with the need for low power usage by the cooling system., Over time, the presence of thermal inhomogeneity in a pack causes non-uniform utilization of electrode materials and can result in,heterogeneous solid-electrolyte interface growth, localized lithium plating, and accelerated capacity fade. Systems with low cooling, capacity use less energy but allow for greater temperature differences between cells to develop, while systems with high cooling ca,pacity use more energy but allow stronger thermal gradients within cells to develop. This study seeks to improve the design of UUV b,attery thermal management systems by determining the relative importance of maintaining uniform temperature fields between cells vs., within cells in a battery pack on the performance, lifespan, and safety of the battery.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Apr 01, 2022
- Source ID
- N000142212065
Entities
People
- Partha P. Mukherjee
Organizations
- Office of Naval Research
- Purdue University
- United States Navy