In-Vehicle Wireless Power Control During EV Charging
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Solution Overview
Problem
Existing in-vehicle communication devices struggle to set transmission power for wireless communication to a suitable level when a vehicle is in a parked and charging state, which can affect the efficiency and duration of charging.
Innovation Solution
An in-vehicle communication device that determines transmission power based on whether the vehicle is in a quick or normal charging mode, adjusting power levels to optimize communication and charging efficiency by setting the upper limit of transmission power accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmission power for wireless communication is increased to ensure reliable communication in a parked and charging vehicle, then communication reliability is improved, but charging time increases due to higher energy consumption
Solution Approach 1:
The patent applies dynamics by making the transmission power adjustable rather than fixed. The control unit dynamically changes the upper limit of transmission power based on the charging state (first charging state vs. second charging state), allowing the system to adapt power levels to current conditions and resolve the contradiction between communication reliability and charging time.
Solution Approach 2:
The patent changes the parameter of transmission power based on charging state. By setting different upper limits for transmission power in different charging states, the system optimizes the balance between communication quality and energy consumption, thereby addressing the trade-off between communication reliability and charging duration.
2Reliability
If transmission power is set to a high level to maintain communication quality, then communication quality is improved, but energy consumption increases reducing charging efficiency
Solution Approach 1:
The system dynamically adjusts transmission power levels based on real-time charging state detection. By switching between different power upper limits corresponding to different charging states, the system maintains communication quality when needed while reducing energy consumption during charging, thus resolving the contradiction between communication quality and energy usage.
Solution Approach 2:
The patent implements parameter changes by modifying the transmission power upper limit according to charging state. This allows the system to optimize the balance between communication quality and energy consumption by selecting appropriate power levels for different operational contexts.
3Productivity
If transmission power is reduced to minimize impact on charging time, then charging efficiency is improved, but communication reliability deteriorates
Solution Approach 1:
The control unit dynamically adjusts transmission power based on charging state detection. By implementing multiple charging states with different power upper limits, the system ensures communication reliability is maintained when necessary while optimizing charging efficiency when appropriate, thus resolving the contradiction between charging efficiency and communication reliability.
Solution Approach 2:
The patent changes the transmission power parameter according to charging state to resolve the contradiction. By setting different upper limits for transmission power in different charging states, the system achieves both charging efficiency and communication reliability under different operational conditions.
Data Source
AI summary
An in-vehicle communication device mounted in a vehicle, comprises a control unit that determines transmission power for wireless communication on a basis of whether a current charging mode corresponds to a first mode or a second mode with respect to the wireless communication using the in-vehicle communication device performed when the vehicle is in a parked state and in a charging state where a secondary cell that supplies power to a motor provided in the vehicle is being charged.