Power Stabilizing System with Step Difference Storage Pack
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Solution Overview
Problem
Existing power stabilizing systems with storage packs are costly and large due to the need for complex controlling devices to manage State of Charge (SOC) and prevent overcharging/overdischarging, which can lead to power outages and system degradation.
Innovation Solution
A power stabilizing system with a storage pack that has a charging/discharging curve with a step difference passing through the rated voltage of the power supplying mechanism, reducing the need for monitoring and controlling devices, and utilizing lithium ion secondary batteries with specific positive and negative electrode active materials to maintain SOC within optimal ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a controlling device or switch circuit is provided to monitor and control the SOC of the secondary battery, then the secondary battery can be controlled to avoid overly charged/discharged states, but the system becomes expensive and large in scale
Solution Approach 1:
The storage pack is designed to automatically maintain its SOC within the optimal range (20-80%) through its inherent charging/discharging characteristics. The system self-regulates by utilizing the natural voltage-SOC relationship of the battery, eliminating the need for external monitoring devices or control circuits. This self-service mechanism resolves the contradiction by achieving reliable SOC control without adding complex control systems.
Solution Approach 2:
The invention changes the operating parameters of the storage pack by limiting the SOC range to 20-80% and designing the charging/discharging curve to have a step difference that passes through the rated voltage. This parameter change enables the system to operate reliably within optimal bounds without requiring active monitoring or control devices, thus resolving the contradiction between reliability and system complexity.
2Device complexity
If the storage pack operates without SOC monitoring and control, then system cost and scale are reduced, but the risk of overcharging/overdischarging and power outages increases
Solution Approach 1:
The storage pack is pre-designed with a charging/discharging curve that has a step difference passing through the rated voltage of the power supplying mechanism. This preliminary design ensures that the battery naturally operates within safe SOC boundaries (20-80%) without requiring real-time monitoring or control actions, thus maintaining reliability while minimizing system complexity.
Solution Approach 2:
The system uses the inherent electrochemical characteristics of the storage pack to automatically maintain reliable operation. The step difference in the charging/discharging curve creates natural boundaries that prevent overcharging and overdischarging, allowing the system to self-regulate without external control mechanisms.
3Device complexity
If the storage pack uses a charging/discharging curve with a step difference passing through rated voltage, then system cost is reduced by eliminating control devices, but the design complexity of the storage pack increases
Solution Approach 1:
The invention modifies the electrochemical parameters of the storage pack by selecting electrode materials and designing the cell configuration to produce a charging/discharging curve with a step difference at the rated voltage. This parameter change is incorporated into the manufacturing design phase, making the complex curve characteristic an inherent feature of the product rather than a result of complex control systems.
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 configuration reduces system costs and scale, minimizes power outages, and prolongs the system's lifetime by maintaining the SOC within optimal ranges, thereby reducing degradation and operational costs.
Implementation Method 1
a storage pack (13) connected to the power line. The charging/discharging curve of the storage pack (13) measured with a constant C-rate
Implementation Method 2
The lithium ion battery can generate a severe voltage difference variation during a discharging process when the two voltage platforms are switched
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
Cost reduction and scale reduction of a power supplying system are achieved. A power supplying system 1 includes a power supplying mechanism 10, an electric load 11, a power line 12, and a storage pack 13. The power supplying mechanism 10 supplies a DC power. The electric load 11 is connected to the power supplying mechanism 10. The power line 12 connects between the power supplying mechanism 10 and the electric load 11. The storage pack 13 is connected to the power line 12. The charging/discharging curve of the storage pack 13 has a step difference that passes through the rated voltage of the power supplying mechanism 10. An average discharging voltage on a lower-SOC side than the start point of the step difference that the charging/discharging curve of the storage pack 13 has is -20% or more of the rated voltage. An average charging voltage on a higher-SOC side than the end point of the step difference that the charging/discharging curve of the storage pack 13 has is +20% or less of the rated voltage.