Electric Vehicle Dual Charging Circuit for Reliable Initial Power
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Solution Overview
Problem
Existing electric vehicle charging systems are prone to errors during initial charging, leading to potential vehicle malfunction or damage, especially in manned driving scenarios, due to reliance on software-controlled charging circuits that lack accuracy and are vulnerable to software or controller errors.
Innovation Solution
Incorporating a hardware type condenser charging circuit that operates independently of software control, allowing for direct switching and voltage monitoring, to ensure reliable and accurate initial charging, with the option to switch to software charging when hardware is partially broken.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a software type condenser charging circuit is used to control initial charging, then the charging process can be monitored and controlled, but the system becomes vulnerable to software or controller errors that may prevent charging or cause electrical breakdown
Solution Approach 1:
The charging control function is segmented into two independent circuits: a software type condenser charging circuit for normal operation and a hardware type condenser charging circuit for backup. This segmentation ensures that software errors in one circuit do not affect the other, thereby improving charging reliability while maintaining manageable complexity through functional division.
Solution Approach 2:
The system changes the control parameter from purely software-based to a hybrid approach where the hardware circuit provides direct electrical control independent of software states. This parameter change allows the system to bypass software errors by switching to hardware-level control, resolving the contradiction between reliability and complexity.
2Measurement precision
If software control is used to monitor voltage during initial charging, then charging can be managed, but accuracy of initial charging control is insufficient due to indirect monitoring
Solution Approach 1:
The hardware type condenser charging circuit acts as an intermediary that provides direct voltage monitoring and control capability. This intermediary circuit bypasses the indirect software-based monitoring path, enabling more accurate and immediate voltage detection during initial charging, thereby improving measurement precision without significant time loss.
3Ease of manufacture
If only software control is used for initial charging, then the system is simpler to implement, but errors in software or controller operations may cause the DC-link condenser or loads to electrically break
Solution Approach 1:
The hardware type condenser charging circuit is designed as a pre-prepared backup system that cushions against software or controller errors. This prior cushioning ensures that if software errors occur during initial charging, the hardware circuit can take over to prevent electrical damage to the DC-link condenser or loads, thereby reducing harmful factors while maintaining ease of manufacture through modular design.
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 dual charging system prevents vehicle malfunction and electrical damage by ensuring normal charging even with software or controller errors, improving accuracy and safety, particularly in manned driving conditions, and allowing for efficient operation in both manned and unmanned modes.
Implementation Method 1
a direct-current (DC) power source; a DC-link condenser
Data Source
AI summary
In an electric vehicle, a power supplier includes a software type condenser charging circuit and a hardware type condenser charging circuit. The software capacitor charging circuit operates when a controller controls the software type condenser charging circuit while monitoring a voltage between opposite ends at an initial charging stage. The hardware type condenser charging circuit is operated when the controller controls the hardware type condenser charging circuit without monitoring the voltage between the opposite ends of the DC-link condenser or by direct switching manipulation of a user.