Electric Storage Device Battery Segmentation V2G Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric storage devices for vehicle-to-grid (V2G) systems face challenges in efficiently managing the different characteristics of high-capacity and high-output batteries, leading to battery deterioration and reduced incentives due to improper charging and discharging modes, which affects the stability of the power system and owner incentives.
Innovation Solution
An electric storage device comprising a high-capacity battery and a high-output battery with distinct characteristics, controlled by a processor to operate in specific modes suitable for each, ensuring continuous discharging for supply-demand balance and intermittent charging/discharging for frequency stabilization, thereby optimizing battery performance and incentives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single battery is used for both continuous discharging and intermittent charging/discharging operations, then the device complexity is reduced, but the battery deterioration increases and reliability decreases
Solution Approach 1:
The battery system is segmented into two distinct batteries: a high-capacity battery for continuous discharging operations and a high-output battery for intermittent charging/discharging operations. This segmentation allows each battery to be optimized for its specific function, preventing deterioration from inappropriate operational modes and improving overall system reliability.
2Use of energy by moving object
If high-capacity battery is used for intermittent charging and discharging, then the energy weight density is improved, but the battery deterioration increases due to unsuitable operational mode
Solution Approach 1:
Different operational modes are assigned to different batteries based on their characteristics. The high-capacity battery is dedicated to continuous discharging where its high energy density is advantageous, while the high-output battery handles intermittent charging/discharging where rapid response is needed. This local optimization prevents the high-capacity battery from suffering deterioration due to unsuitable intermittent operations.
3Power
If high-output battery is used for continuous discharging, then the output weight density is improved, but the battery deterioration increases due to prolonged operation in inappropriate mode
Solution Approach 1:
The high-output battery is specifically assigned to intermittent charging/discharging operations where its high power density and rapid response capabilities are fully utilized. This prevents the battery from deterioration caused by prolonged continuous discharging, extending its lifespan while maintaining system performance.
4Ease of operation
If battery operations are not aligned with their characteristics, then the ease of operation is improved, but the productivity and incentives are reduced due to battery deterioration
Solution Approach 1:
The control device automatically determines the appropriate operational mode for each battery based on their inherent characteristics (high-capacity for continuous discharging, high-output for intermittent operations). This self-service approach aligns battery operations with their optimal performance modes without requiring complex manual intervention, thereby extending battery lifespan and maintaining high productivity for V2G participation.
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 effectively suppresses battery deterioration while maximizing owner incentives by aligning battery operations with their respective characteristics, improving the stability and efficiency of the power system and increasing participation in V2G systems.
Implementation Method 1
a first electric capacitor (1E-1), a second electric capacitor (1E-2)... The first electric capacitor continuously discharging electric power to the external power system
Implementation Method 2
the second electric capacitor discharging electric power to the external power system and being charged by the external power system, intermittently
Implementation Method 3
a converter, and a processor. The converter converts electric power transmitted between an external power system external to the electric storage device and at least one of the first electric capacitor and second electric capacitor
Data Source
AI summary
An electric storage device includes a first electric capacitor, a second electric capacitor, a converter, and a processor. The converter converts electric power transmitted between an external power system external to the electric storage device and at least one of the first electric capacitor and second electric capacitor. The processor is configured to control the converter to operate in at least one of a first mode and a second mode, the first electric capacitor continuously discharging electric power to the external power system in the first mode, the second electric capacitor discharging electric power to the external power system and being charged by the external power system, intermittently, to stabilize frequencies in the external power system in the second mode.