EV Charging Voltage Request Control for Mismatched Station Supply
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrified vehicles face inefficiencies in battery charging due to voltage mismatches between the vehicle's requested charging voltage and the charging station's supply power, leading to potential inability to charge the battery and decreased charging efficiency when unnecessary boosting is performed.
Innovation Solution
The electrified vehicle includes a position information acquisition device to determine the charging station's voltage and a charging control device to set and notify the requested voltage, allowing efficient charging by boosting power on the vehicle side when necessary, and utilizing communication with an information management device to acquire and set the appropriate voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrified vehicle notifies the charging station about the maximum voltage (rated voltage) permitted for charging the battery, then the battery can be charged with the supply power from the charging station, but when the voltage of supply power is lower than the requested voltage, determination is made that the voltage cannot be supplied and the battery cannot be charged
Solution Approach 1:
The patent applies dynamics by making the requested voltage adjustable based on actual conditions. The charging control device can dynamically change the requested voltage from the initial rated voltage to a lower voltage that matches the charging station's supply power, enabling adaptive charging across different voltage environments.
Solution Approach 2:
The patent changes the voltage parameter dynamically. Instead of fixing the requested voltage at the battery's rated voltage, the system allows the requested voltage to be modified based on the charging station's capabilities, transforming a static parameter into a dynamic one that adapts to external conditions.
2Adaptability or versatility
If the electrified vehicle performs boosting control to charge the battery with boosted electric power, then the battery can be charged regardless of the magnitude of the voltage of the supply power, but when the charging station is capable of supplying a voltage higher than the requested voltage, the boosting control that was originally unnecessary is performed and the efficiency of charging the battery decreases
Solution Approach 1:
The patent implements feedback by having the charging control device receive information about the charging station's supply power voltage and use this feedback to adjust the requested voltage accordingly. This closed-loop control prevents unnecessary boosting by matching the requested voltage to the actual supply capability, thereby avoiding energy losses.
Solution Approach 2:
The patent performs preliminary action by acquiring information about the charging station's supply power voltage before initiating charging. This advance knowledge allows the system to set an appropriate requested voltage from the outset, preventing the need for subsequent boosting operations and associated energy losses.
3Productivity
If the electrified vehicle notifies the charging station about the requested voltage without knowing the voltage of supply power, then the charging process can start, but the vehicle may not be able to charge the battery if the supply power voltage does not match the requested voltage
Solution Approach 1:
The patent performs preliminary action by acquiring information about the charging station's supply power voltage before setting the requested voltage and starting charging. This advance preparation ensures that the requested voltage is appropriately matched to the supply power, enabling both quick charging initiation and reliable charging execution.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach ensures efficient battery charging by preventing unnecessary boosting and ensuring the vehicle can charge regardless of the charging station's voltage, thereby optimizing charging efficiency.
Implementation Method 1
the motor generator (MG) and the inverter (3) that functions as a multiphase step-up converter can function as a booster
Data Source
AI summary
Electrified vehicle of the present disclosure includes a position information acquisition device that is capable of charging a battery with supply power supplied to a charging inlet from an external charging facility and charging a battery with power obtained by boosting the supply power on the vehicle side, and acquires position information of the external charging facility, a voltage of supply power of the external charging facility associated with the position information acquired by the position information acquisition device, and a charging control device that sets a voltage of the acquired supply power to a request voltage to be supplied from the external charging facility to the charging inlet, and notifies the external charging facility of the set request voltage.