Vehicle Charge-Discharge Control Unit Preventing Power Interference
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Solution Overview
Problem
In existing charge-discharge systems, false recognition of discharge requests by the control unit can lead to electric power interference, causing unnecessary interruptions in charging operations and potential discharging of external electric storage devices.
Innovation Solution
The control unit is configured to assess requests for charge and discharge, prioritizing ongoing operations and implementing a charge-discharge stop state when necessary, ensuring that charging continues unless a valid request for discharge is confirmed, thereby preventing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the control unit responds to discharge requests without verification, then the response speed is improved, but false recognition causes electric power interference and charging interruptions
Solution Approach 1:
The control unit performs preliminary verification by checking whether the vehicle is in a charging state before responding to discharge requests. This preliminary action prevents false recognition from causing interference, as the control unit will not initiate discharge operations when charging is actively occurring, thus maintaining charging operation stability while still responding quickly to valid requests
Solution Approach 2:
The control unit implements a feedback mechanism where it continuously monitors the charging state and uses this information to modulate its response to discharge requests. The feedback loop ensures that discharge operations are only permitted when the charging state is not active, preventing electric power interference while maintaining reliable charging operations
2Reliability
If the control unit verifies charging state before responding to discharge requests, then false recognition is prevented, but the response time increases
Solution Approach 1:
The control unit performs the charging state verification as a preliminary check that occurs in the background or parallel to request processing. This preliminary verification is integrated into the control flow such that it does not create significant sequential delays, allowing accurate discharge request handling with minimal response time penalty
Solution Approach 2:
When the control unit determines that the vehicle is not in a charging state, it skips further verification steps and immediately processes the discharge request. This selective skipping optimizes response time by avoiding unnecessary verification delays when the charging state is clearly inactive, while still maintaining reliability when verification is actually needed
Data Source
AI summary
A vehicle 10 according to the embodiment of the present invention is applied to a charge-discharge system CDS. The charge-discharge system includes the vehicle 10, an electric power cable 20, a plug-in station 30, a HEMS 40, and a commercial power supply 50. From the HEMS 40 to the vehicle 10, a request for charge to charge an electric storage device 11 and a request for discharge to allow an external electric load to use an electric power of the electric storage device 11 are transmitted. When a request is changed from the request for charge to the request for discharge, or vice versa, the vehicle 10 realizes a charge-discharge stop state in which neither a charging operation nor a discharging operation is performed without directly changing from the charging operation to the discharging operation, or vice versa.