Modular PV Storage Cabinet With DC Bus for Shorter Power Paths
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Solution Overview
Problem
Existing photovoltaic energy storage systems suffer from complex wiring, high installation costs, and low efficiency due to AC coupling between components.
Innovation Solution
A photovoltaic energy storage system with modularized chambers, a DC bus, and integrated photovoltaic, energy storage, and DC charging modules, utilizing a DC bus for connections and incorporating detecting terminals for electrical reliability and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If modules are arranged as independent split components, then each module can be independently manufactured and installed, but the wiring between modules becomes complicated and cumbersome
Solution Approach 1:
The patent integrates the power conversion system and energy storage unit into a single integrated energy storage cabinet, merging previously separate components into one unified structure. This reduces the number of external connections and wiring between modules while maintaining independent manufacturability of the integrated unit itself.
2Loss of energy
If AC coupling is used to transfer energy between energy storage unit and power conversion system, then energy transfer can be achieved, but the energy transfer path becomes long and efficiency decreases
Solution Approach 1:
By integrating the power conversion system directly into the energy storage cabinet with internal DC bus connections, the patent creates a short energy transfer path between the energy storage module and power conversion system. This eliminates long AC coupling paths through the grid and reduces energy transfer losses.
3Reliability
If detecting terminals are added to plug-in ports for safety control, then electrical reliability and safety are improved, but the plug-in port structure becomes more complex
Solution Approach 1:
The plug-in port is designed with multiple detecting terminals that serve multiple functions: detecting connection status, controlling power transmission, and ensuring safety. This multi-functional design consolidates several control functions into a single integrated component rather than requiring separate devices for each function.
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
Simplifies wiring, reduces installation costs, and enhances efficiency by shortening energy transfer paths and improving electrical reliability while ensuring safety.
Implementation Method 1
at least one of a photovoltaic module, an energy storage module, and a DC charging module, the at least one of the photovoltaic module, the energy storage module, and the DC charging module coupled to the DC bus
Data Source
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AI summary
The present application relates to the field of photovoltaic storage and charging technology, and specifically to a photovoltaic energy storage system, including at least two modularized chambers; a power conversion system coupled to a DC bus, and at least one of a photovoltaic module, an energy storage module, and a DC charging module; where the power conversion system is disposed in one of the modularized chambers; and at least one of the photovoltaic module, the energy storage module, and the DC charging module is disposed in another of the modularized chambers.