Dual Energy Storage Control for Energy-Power Battery Tradeoffs
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Solution Overview
Problem
Conventional energy storage systems face a tradeoff between high energy density and high power delivery, with single-battery chemistry designs often failing to meet the complex power utilization requirements of applications like electric vehicles, which necessitate both high energy storage and rapid power delivery.
Innovation Solution
A dual-energy storage system comprising a High Energy Unit (HEU) and a High Power Unit (HPU) is employed, where the HEU and HPU are controlled independently to leverage their complementary attributes, with a Smart Control Algorithm dynamically managing charging and discharging based on power requirements and the physics and chemistry of each unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single battery chemistry is designed for high energy density, then energy storage capacity is improved, but power delivery capability deteriorates
Solution Approach 1:
The energy storage system is segmented into two distinct battery chemistry units: a high energy density battery (HEU) and a high power density battery (HPU). Each unit is optimized for its specific function, with the HEU handling energy storage and the HPU handling power delivery, thereby resolving the contradiction between energy capacity and power capability that plagues single-chemistry systems.
2Power
If a single battery chemistry is designed for high power delivery, then power output capability is improved, but energy density deteriorates
Solution Approach 1:
The system divides the energy storage function into two specialized components: the HPU is optimized for high power output with appropriate electrode configurations and chemistry, while the HEU is optimized for high energy density. This segmentation allows each unit to excel at its designated function without compromise.
3Power
If a dual-energy storage system is implemented, then both energy density and power delivery are improved, but system complexity increases
Solution Approach 1:
The control system dynamically adjusts the charging and discharging rates of the HEU and HPU based on real-time power requirements and the state of each battery unit. This dynamic control optimizes the utilization of both batteries, managing system complexity through adaptive algorithms that respond to changing operational conditions.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor the state of charge, temperature, and power delivery of both HEU and HPU. This feedback enables the control algorithm to adjust charging/discharging parameters in real-time, ensuring optimal performance while managing the complexity of coordinating two different battery chemistries.
Data Source
AI summary
An electrical storage system comprises a first energy storage system and a second energy storage system having a lower electrical energy density and a higher rated electrical power output capability than the first energy storage system, at least one electrical power sensor configured to sense over a plurality of time intervals, electrical power usage information for a load electrically coupled to the first energy storage system and the second energy storage system, and at least one computer processor programmed to determine based, at least in part, on the sensed electrical power usage information and a power requirement of the load in a current time interval, charging/discharging parameters for each of the first energy storage system and the second energy storage system, and control charging/discharging of each of the first and second energy storage systems in accordance with the determined charging/discharging parameters during the current time interval.