Vehicle Power Transfer Control Device for Charging Communication Abnormalities
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Solution Overview
Problem
Existing power transfer control devices in vehicles consume in-vehicle battery charge unnecessarily when communication abnormalities occur during charging, leading to reduced charging rates and potential depletion of stored energy below desired levels.
Innovation Solution
A power transfer control device with a reduction processing unit that minimizes power consumption during communication abnormalities, using a determination unit to assess the stored power amount and desired travel distance to decide when to reduce power usage, and a notification unit to inform the user of the abnormality, thereby preventing unnecessary charge depletion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the transfer control unit continues to execute power transfer control when a communication abnormality occurs, then the charging rate of the in-vehicle battery may be excessively decreased, but the transfer control unit consumes power in an unnecessary manner when power is not transferred
Solution Approach 1:
The power consumption of the transfer control unit is dynamically adjusted based on communication status. When a communication abnormality is detected, the control unit transitions from a high-power state (executing power transfer control) to a low-power state (reducing power consumption), optimizing energy usage while maintaining reliability
Solution Approach 2:
The system implements feedback through the communication unit to detect communication abnormalities. Based on this feedback, the transfer control unit adjusts its power consumption level, creating a closed-loop control system that responds to communication status changes
2Power
If the transfer control unit executes maximum output operation of the air conditioner when a communication abnormality occurs, then the discharging of the in-vehicle battery increases, but the stored power amount may fall below the lower limit value
Solution Approach 1:
The determination unit performs preliminary assessment of the stored power amount before the transfer control unit executes maximum output operation. By checking whether the stored power amount is above the lower limit value in advance, the system prevents power depletion while enabling high-power discharging when safe
Solution Approach 2:
The system uses its own stored power amount information to make autonomous decisions about whether to execute maximum output operation. The determination unit self-regulates power discharging based on internal state monitoring, eliminating the need for external control
Data Source
AI summary
When connection of a charging gun is detected, a charging-control ECU wakes up, and turns on a power supply relay to activate a charging-communication ECU. The charging-control ECU subsequently actives a power-control computer by communicating therewith. The power-control computer closes an SMR, and closes a power supply switch to activate a monitoring unit. If an abnormality occurs in inband communication, the charging-control ECU opens the power supply relay, instructs the power-control computer to shift into sleep mode, and subsequently shifts itself into sleep mode. The power-control computer opens the SMR and the power supply switch, and subsequently shifts into sleep mode.