Charging Wake-Up Circuit for Electric Vehicle Socket Control
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Solution Overview
Problem
Existing electric vehicle charging sockets have slow wake-up response speeds and unstable wake-up signal transmission due to reliance on the Controller Area Network (CAN) bus, which lacks anti-interference ability.
Innovation Solution
A charging wake-up circuit that includes a state signal detection unit and a wake-up signal output unit, directly connected to the charging socket control unit, generates level signals based on the open/closed state of the charging socket cover to wake up the MCU, eliminating the need for CAN bus intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the CAN bus is used to wake up the charging socket, then the system can be controlled through the existing communication network, but the wake-up response speed is slow and signal transmission is unstable
Solution Approach 1:
The patent extracts the wake-up signal transmission path from the CAN bus communication network and creates a dedicated direct connection between the cover switch and charging socket control unit. This separation removes the charging socket wake-up function from the general-purpose CAN bus, eliminating the interference and delays associated with bus arbitration and signal routing through multiple nodes.
Solution Approach 2:
The patent introduces a dedicated wake-up signal line as an intermediary transmission path between the cover switch and charging socket control unit. This specialized intermediary provides a direct, interference-free communication channel that bypasses the CAN bus protocol overhead, achieving faster and more reliable signal transmission for the specific wake-up function.
2Reliability
If the CAN bus is used for wake-up signal transmission, then existing communication infrastructure can be utilized, but anti-interference ability is poor leading to unstable signal transmission
Solution Approach 1:
The patent extracts the wake-up signal function from the complex CAN bus communication system and implements it through a simple direct electrical connection. This extraction eliminates the charging socket wake-up signals from the CAN bus domain, removing them from exposure to bus-related interference and complexity.
Solution Approach 2:
The patent creates a simplified copy of the communication function specifically for wake-up signals. Instead of using the full CAN bus protocol stack, it implements a dedicated direct signal path that replicates only the essential wake-up notification function, achieving high reliability with minimal complexity.
3Productivity
If a direct connection is made between the state signal detection unit and charging socket control unit, then wake-up response speed increases and signal stability improves, but the circuit complexity increases
Solution Approach 1:
The patent segments the charging system into distinct functional modules: the cover switch as a独立的 detection unit, the dedicated wake-up signal transmission line, and the charging socket control unit. This segmentation allows each component to perform its specific function independently with simple, focused circuitry, reducing overall system complexity while improving wake-up efficiency.
Data Source
Figure 1
AI summary
The present disclosure relates to the technical field of electric vehicle charging, and in particular to a charging wake-up circuit, a charging socket and an electric vehicle. The charging wake-up circuit includes: a state signal detection unit and a wake-up signal output unit. The state signal detection unit is configured to generate a state input signal based on an open state and a closed state of a charging socket cover of an electric vehicle; and an input end of the wake-up signal output unit is connected to an output end of the state signal detection unit, an output end of the wake-up signal output unit is connected to a charging socket control unit of the electric vehicle, and the wake-up signal output unit is configured to output, based on the state input signal, a change in a level signal to serve as a wake-up signal for the charging socket control unit. The charging wake-up circuit of the present disclosure has low costs, is low in power consumption and has good anti-interference performance, and the charging socket control unit can directly acquire the wake-up signal, so that the response speed is high.