EV Charging Fault Feedback via Adaptive Bus Frequency
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Solution Overview
Problem
Existing electric vehicle charging systems face challenges in timely acquisition of fault information from faulty charging devices, leading to increased safety risks due to the limitations in information type and sending frequency on the communication bus.
Innovation Solution
A fault feedback method and apparatus for electric vehicle charging devices that detect faults and send charging device information to the electric vehicle controller at an adjusted frequency higher than the original communication frequency, enabling quicker fault detection and response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the information sending frequency is limited to reduce communication bus pressure, then the communication bus pressure is reduced, but the fault information transmission delay increases
Solution Approach 1:
The patent dynamically adjusts the information sending frequency based on the operational state of the charging device. During normal operation, the original communication frequency is used to reduce bus pressure. When a fault is detected, the frequency is automatically increased to ensure timely fault information transmission. This dynamic adjustment resolves the contradiction by making the sending frequency adaptive rather than fixed.
Solution Approach 2:
The patent changes the communication parameter (sending frequency) based on the detected fault condition. Upon detecting a fault in the charging device, the system transitions from the original communication frequency to an adjusted higher frequency for fault information transmission. This parameter change enables the system to prioritize fault information delivery while maintaining normal communication efficiency during non-fault conditions.
2Use of energy by moving object
If the information type is limited to reduce communication bus pressure, then the communication bus pressure is reduced, but the fault detection capability deteriorates
Solution Approach 1:
The patent extracts and prioritizes fault-related information from the overall communication data stream. When a fault is detected, the system specifically extracts fault information and transmits it at a higher frequency, while other non-critical information continues to use the original communication schedule. This extraction approach ensures fault detection capability is maintained without significantly increasing overall communication bus pressure.
Solution Approach 2:
The patent implements a feedback mechanism where the charging device monitors its own operational state and communicates fault conditions to the controller. The controller receives this feedback and adjusts communication frequency accordingly. This feedback loop ensures that fault detection information is reliably transmitted while maintaining efficient normal operation, resolving the contradiction between information type limitation and fault detection capability.
Data Source
AI summary
This disclosure relates to the field of electric vehicles, and in particular to a fault feedback method and apparatus of an electric vehicle charging device, and a device. The method includes: acquiring charging device information of an electric vehicle charging device; determining fault information of the charging device based on the charging device information; acquiring, based on an original communication frequency of the charging device information and the fault information, an adjustment frequency higher than the original communication frequency, and the original communication frequency of the charging device information is set by an electric vehicle controller; and sending the charging device information to the electric vehicle controller according to the adjustment frequency, so that the electric vehicle controller determines a fault of the charging device based on the charging device information. In embodiments of this disclosure, a transmission speed of the charging device information is increased, so that the electric vehicle controller quickly determines and deals with the fault based on the charging device information, thereby reducing potential safety risks in charging.