- Second-use battery energy storage systems (2-BESS)
- Repurpose automotive batteries
Abstract:
Repurposing automotive batteries may have environmental and economic benefits. The challenge with second-use batteries is the uncertainty and diversity of the expected packs in terms of their chemistry, capacity, and remaining useful life.
A new method for designing a second-use energy storage system (2-BESS) using a sparse hierarchical power processing architecture has been invented. It uses a new strategy to optimize 2-BESS performance despite the diversity or heterogeneity of individual batteries while reducing the cost of power conversion. The statistical distribution of the power heterogeneity in the supply of batteries is considered when optimizing the choice of power converters and designing the power flow within the battery energy storage system (BESS) to maximize battery utilization. It uses data on supply heterogeneity, testing accuracy, and aging/degradation to optimally choose power converter ratings and power connectivity within2-BESS. This results in higher battery utilization in capacity and power while using lower power converters, high heterogeneity.
Website:
https://umich.flintbox.com/technologies/38EF198D792F4A3AAE2A362E8CE34B9A
Advantages:
High battery utilization in capacity and power
Use lower power converters
High system efficiency
Potential Applications:
Power grid
Micro and nanogrid
EV charging station
Contact Information:
Name: Joohee Kim
Email: jooheek@umich.edu
Phone: (734) 647-5730