Energy Storage Power Matching for Reliable PCS Integration
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Solution Overview
Problem
The existing energy storage apparatuses suffer from poor power matching with power conversion systems, leading to inefficiencies in capacity supplementation, long-term reliability, and economic inefficiency.
Innovation Solution
The energy storage apparatus is designed with specific power and capacity ratios (P/(M*Q/A) within the range of 0.7 to 0.99, ensuring adequate power margin without excessive waste, and using battery cells of equal specifications to improve assembly efficiency and space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the energy storage apparatus uses battery cells of different specifications to maximize space utilization, then space utilization improves, but assembly efficiency decreases and reliability deteriorates due to capacity supplementation requirements
Solution Approach 1:
The patent applies homogeneity by requiring all battery cells in the energy storage apparatus to have equal capacities. This standardization simplifies the assembly process, improves assembly efficiency, and eliminates the need for capacity supplementation, thereby resolving the contradiction between space utilization and assembly efficiency.
2Reliability
If the energy storage apparatus is designed with large power margin (P/(M*Q/A) close to 0.99), then long-term reliability improves, but economic efficiency deteriorates due to excessive power waste
Solution Approach 1:
The patent applies parameter changes by optimizing the power matching ratio P/(M*Q/A) to a specific range (0.90-0.95). This parameter optimization balances the conflicting requirements of long-term reliability and economic efficiency, avoiding both excessive power margin and insufficient reliability.
3Loss of energy
If the energy storage apparatus is designed with small power margin (P/(M*Q/A) close to 0.7), then economic efficiency improves, but long-term reliability deteriorates due to frequent capacity supplementation
Solution Approach 1:
The patent applies parameter changes by setting the power matching ratio P/(M*Q/A) within the optimized range of 0.90-0.95. This parameter selection prevents frequent capacity supplementation while avoiding excessive power waste, thereby resolving the contradiction between economic efficiency and long-term reliability.
4Productivity
If the energy storage apparatus uses battery cells of equal specifications, then assembly efficiency improves and space wastage is reduced, but power matching with power conversion system may deteriorate
Solution Approach 1:
The patent applies parameter changes by optimizing the power matching ratio P/(M*Q/A) to a specific range (0.90-0.95). This parameter optimization ensures that battery cells of equal specifications can be used while maintaining good power matching with the power conversion system, resolving the contradiction between assembly efficiency and power matching.
Data Source
AI summary
An energy storage apparatus and system are provided. The apparatus is configured for electrical connection to a power conversion system capable of interfacing with M such apparatuses. The rated output power of the power conversion system is P, the energy capacity of each storage apparatus is Q, and A is the time for discharging from full to empty. The apparatus operates under the constraint: 0.7≤P/(M×Q/A)≤0.99. This configuration ensures that total energy apparatus power maintains a sufficient margin below the system's rated power, avoiding the need for frequent capacity upgrades and enhancing long-term reliability. At the same time, the lower bound ensures that the margin is not excessive, minimizing energy waste and improving economic efficiency. As a result, optimal power matching between the energy storage apparatus and the power conversion system is achieved.