EV Charging Port Voltage Control for Booster-Pile Compatibility
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Solution Overview
Problem
Existing electric vehicle charging systems face instability and reduced efficiency due to complex control logic and voltage drops at the charging port, leading to current impacts and ripples, especially when switching between different charging piles and vehicles, and compatibility issues with varying charging pile outputs.
Innovation Solution
The charging method involves determining a target voltage for the charging port based on the current voltage, maximum rechargeable voltage, and electrical characteristics of the Booster, allowing the Booster to maintain voltage without controlling current, thereby simplifying control logic and preventing voltage drops, which enhances compatibility with different charging piles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the Booster controls both voltage and current during charging, then charging functionality is complete, but control logic becomes complex and system stability deteriorates
Solution Approach 1:
The patent divides the charging control functions into separate modules: the charging pile independently controls voltage output, while the vehicle's Booster only controls current. This functional segmentation eliminates the complexity of dual-control logic and prevents the instability caused by conflicting control signals, as each component has a dedicated control responsibility.
Solution Approach 2:
The patent introduces an intermediary control strategy where the charging pile acts as the primary voltage controller and the vehicle's control system acts as a mediator that requests current from the pile based on battery state. This intermediary approach simplifies the Booster's role to current control only, while voltage management is handled by the charging pile's control system.
2Productivity
If the charging system uses high voltage platforms (500V-750V) to increase charging power, then charging speed improves, but compatibility with existing charging piles becomes difficult
Solution Approach 1:
The patent employs dynamic voltage adjustment where the vehicle's Booster adapts its operating voltage based on the charging pile's output capabilities. The system dynamically matches the vehicle's high-voltage platform requirements with the available charging infrastructure, allowing flexible operation across different voltage levels while maintaining optimal charging performance.
Solution Approach 2:
The patent changes the electrical parameters (voltage and current) dynamically during charging based on the battery's state of charge. As the battery approaches full charge, the system adjusts voltage and current parameters to optimize both charging speed and compatibility with the charging pile's output characteristics.
3Stability of the object's composition
If the Booster maintains voltage during charging, then voltage stability improves, but current control capability is lost
Solution Approach 1:
The patent segments the control functions by assigning voltage stabilization to the charging pile's control system and current control to the vehicle's Booster. This segmentation allows the Booster to focus solely on current regulation without the conflicting requirement of maintaining voltage, thereby eliminating current impacts and ripples that would result from attempting dual control.
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 stabilizes the charging process, avoids current impacts and voltage drops, and improves the efficiency of the Booster by maintaining a consistent voltage, thus enhancing the compatibility and performance of the charging system across various charging piles.
Implementation Method 1
a voltage increasing device configured to increase a voltage of the power battery to a charging port voltage of the charging port
Data Source
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AI summary
The disclosure relates to the field of electric automobiles, in particular to a charging method, a storage medium and a vehicle. The charging method includes: obtaining (S101) a current voltage of a power battery of the vehicle and a maximum rechargeable voltage of an external charger connected to the vehicle; determining (S102) a target voltage of the charging port of the vehicle according to the current voltage, the maximum rechargeable voltage and an electrical characteristic of the Booster of the external charger; determining (S103) a target request voltage of the vehicle according to the target voltage of the charging port; and controlling (S104) the Booster according to the target request voltage, where the external charger charges the vehicle according to the target request voltage.