Bidirectional Power Converter Stabilizes Vehicle Discharge
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Solution Overview
Problem
Existing electric power supply systems for vehicles, such as plug-in hybrid and electric vehicles, face instability in electricity discharge into alternating-current power lines due to external environmental influences, leading to adverse effects on the power line, requiring complex stabilization devices.
Innovation Solution
An electric power supply system utilizing a bidirectional power converter to stabilize electricity discharge from a vehicular power accumulating device into an alternating-current power line, connected through a power storage unit and charge-and-discharge units, without the need for additional complicated devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same electricity supply system and conversion device are used for both charging the power accumulating device and discharging electricity into the alternating-current power line, then the system configuration is simplified, but the discharged electricity becomes unstable and exerts adverse effects on the power line
Solution Approach 1:
The patent divides the electricity supply system into two separate systems: one for charging the power accumulating device and another for discharging electricity into the alternating-current power line. This segmentation allows each system to be optimized independently, with the discharge system incorporating stabilization devices to ensure electricity stability while maintaining overall system functionality.
Solution Approach 2:
The patent introduces a conversion device as an intermediary component between the power accumulating device and the alternating-current power line. This conversion device stabilizes the fluctuating electricity output from the power accumulating device before it is supplied to the power line, thereby resolving the instability issue without requiring complete system redesign.
2Reliability
If additional devices are provided to stabilize the discharged electricity, then the electricity stability is improved, but the device complexity increases
Solution Approach 1:
The patent designs the conversion device to perform multiple functions: it not only converts the electricity from the power accumulating device but also stabilizes the discharged electricity and interfaces with the alternating-current power line. This multi-functionality reduces the need for separate stabilization devices, thereby improving electricity stability without proportionally increasing device complexity.
Solution Approach 2:
The patent combines the stabilization function with the existing conversion device structure by integrating stabilization components into the conversion device. This merging approach allows the stabilization function to be achieved without adding completely separate devices, thus improving electricity stability while minimizing the increase in overall device complexity.
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
The system effectively stabilizes electricity discharge into the alternating-current power line, ensuring stable power supply without the requirement for additional stabilization devices, maintaining efficiency and reducing the need for complex equipment.
Implementation Method 1
a bidirectional power converter configured to convert bilaterally between alternating-current electricity and direct-current electricity
Data Source
AI summary
An alternating-current power line is wired in a building for supplying alternating-current electricity to an electric load. A bidirectional power converter converts bilaterally between alternating-current electricity and direct-current electricity. A power storage unit is connected to the alternating-current power line through the bidirectional power converter. The power storage unit is charged with electricity from the alternating-current power line and discharges direct-current electricity into the alternating-current power line. A charge-and-discharge unit charges a vehicular power accumulating device with alternating-current electricity supplied from the alternating-current power line through a connecting terminal and discharges electricity outputted as alternating-current electricity from the vehicle to the connecting terminal. A power converter converts alternating-current electricity outputted from the vehicle through the connecting terminal into direct-current electricity and discharges the converted direct-current electricity through the bidirectional power converter into the alternating-current power line.