Partial Power Conversion for Mismatched Battery Voltage Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems face challenges in efficiently transferring power between energy storage systems with different parameters, such as voltage, leading to inefficiencies and power losses.
Innovation Solution
The implementation of a partial power processing conversion device that adjusts the voltage of a battery system to match another system connected in parallel, using a combination of DC-DC converters and a controller to manage power flow and reduce losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If full power processing conversion device is used to adjust voltage between mismatched battery systems, then voltage matching is achieved, but power losses increase due to processing all power through conversion stages
Solution Approach 1:
The conversion device is segmented into two parallel paths: a conversion stage for voltage adjustment and a bypass path for direct power transfer. This segmentation allows only the necessary portion of power (corresponding to the voltage difference) to undergo conversion, while the remaining power bypasses the conversion stage, thereby reducing power losses associated with full power processing.
Solution Approach 2:
Instead of processing all power through the conversion stage, the system applies partial power processing by directing only the selected portion of power (corresponding to the voltage difference between battery systems) through the conversion stage. This partial action minimizes energy losses while still achieving the required voltage matching.
2Productivity
If conversion device processes all power to adjust voltage, then voltage matching is achieved, but efficiency decreases due to conversion losses
Solution Approach 1:
The power flow is segmented into two paths: one through the conversion stage for voltage adjustment and another bypass path for direct power transfer. This segmentation ensures that only the minimum necessary power undergoes conversion, thereby minimizing conversion losses and maximizing overall power transfer efficiency.
Solution Approach 2:
The system implements partial power processing by directing only the selected portion of power (corresponding to the voltage difference) through the conversion stage. This approach reduces conversion losses while maintaining the required voltage matching, thereby improving power transfer efficiency.
3Adaptability or versatility
If battery systems with different voltages are connected in parallel, then power transfer between mismatched systems is enabled, but system stability is compromised
Solution Approach 1:
The conversion device acts as an intermediary between battery systems with different voltages. It provides a controlled interface that adjusts voltage levels and regulates power flow, enabling safe power transfer between mismatched systems while maintaining system stability through regulated operation.
Solution Approach 2:
The conversion device dynamically changes voltage parameters to match between the donor and recipient battery systems. By adjusting the voltage of one system to conform to the other through controlled conversion, the system achieves voltage compatibility while maintaining stability through regulated parameter changes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances efficiency in power transfer by reducing the amount of power processed through conversion stages, thereby minimizing losses and improving overall system performance.
Implementation Method 1
The conversion device is configured to receive power from the first battery system, cause a selected portion of the power to flow through a conversion stage to adjust the first voltage
Data Source
AI summary
An energy transfer system includes a conversion device configured for partial power processing and configured to regulate current from a first battery system, and a controller configured to control the conversion device to adjust a first voltage of the first battery system to conform the first voltage to a second voltage of a second battery system, the second battery system connected in parallel with the first battery system by a bus. The conversion device is configured to receive power from the first battery system, cause a selected portion of the power to flow through a conversion stage to adjust the first voltage, the selected portion corresponding to a difference between the first voltage and the second voltage, cause a remaining portion of the power to flow directly to the bus and bypass the conversion stage, and output a current from the conversion device at the second voltage.