EV Charge/Discharge System Power Segmentation
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Solution Overview
Problem
Conventional electric vehicle charge/discharge systems connected to smart grids for extended periods waste energy and accelerate the degradation of components, as they supply power to all high voltage system equipment, including irrelevant units, during charging and discharging.
Innovation Solution
A charge/discharge system that includes a power supply unit to control power distribution, ensuring power is only supplied to units relevant to the charging and discharging process, specifically targeting the battery and charge/discharge control units, while disconnecting power to units like the drive motor control device during these operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power is supplied to all units in the high voltage wiring system when a charge/discharge gun is connected, then all equipment can operate during charging/d discharging, but power is wasted and parts degradation accelerates during long-term smart grid connection
Solution Approach 1:
The high voltage wiring system is segmented into multiple independent units (battery, charge/discharge control device, drive motor control device, etc.), and power supply is selectively controlled for each unit based on whether it is needed for charge/discharge operations. This allows irrelevant units to be powered down while charge/discharge related units remain operational.
Solution Approach 2:
The power supply state of each unit is dynamically adjusted based on the operational requirements. When charge/discharge is performed, only necessary units receive power; when not performing charge/discharge, power is cut to irrelevant units. This dynamic power management resolves the contradiction between maintaining reliability and reducing energy loss.
2Reliability
If power is supplied to all units in the high voltage wiring system when a charge/discharge gun is connected, then all equipment can operate during charging/d discharging, but parts degradation accelerates during long-term smart grid connection
Solution Approach 1:
The system is divided into charge/discharge-related units and irrelevant units. By selectively powering only the necessary units during smart grid connection, the operational duration of irrelevant units is reduced, thereby suppressing parts degradation and extending service life while maintaining charge/discharge functionality.
Solution Approach 2:
Power is periodically supplied to units based on operational needs rather than continuously. During long-term smart grid connection for charge/discharge, power is intermittently provided only when required, reducing cumulative operational stress on parts and extending their service life.
3Adaptability or versatility
If power is supplied to all units in the high voltage wiring system when a charge/discharge gun is connected, then all equipment can operate during charging/d discharging, but energy is wasted during long-term smart grid connection
Solution Approach 1:
The power supply system is segmented to independently control power distribution to different units. This allows the system to adaptively power only the necessary charge/discharge-related units while keeping irrelevant units powered down, maintaining operational flexibility for charge/discharge functions while eliminating wasted energy consumption.
Data Source
AI summary
A charge/discharge system is mounted on an electric vehicle using a motor as a driving source, which is driven by electric power charged in a battery, and controls at least one of charge from the outside of the vehicle to the battery and discharge from the battery to the outside of the vehicle. The charge/discharge system comprises a power supply unit for controlling power supply to supply power only to a unit contributing charge/discharge among units connected to a wiring system of driving power for the motor when charge/discharge to/from the battery from/to the outside of the vehicle is performed.