EV Charging Controller Circuit for Reverse Current Blocking
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current electric vehicle charging systems are unable to accurately detect and prevent various issues during the battery charging process, such as reverse current and connection status problems, which can lead to safety concerns and system instability.
Innovation Solution
An electric vehicle charging controller is designed with a switching unit, signal generation, voltage distribution, sensing, and determination units to generate a switching signal, distribute voltage, sense the voltage, and determine the connection status by analyzing the voltage value, including a bipolar junction transistor and resistors to block reverse current and detect shorts or disconnections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the charging system uses high-voltage electricity to charge the battery, then charging speed and efficiency are improved, but safety issues such as electric shock and system failure due to reverse current occur
Solution Approach 1:
The patent introduces a charging controller as an intermediary device between the power source and battery. The controller includes a switching element that acts as a mediator to control current flow direction and prevent reverse current from reaching the power source, thus solving the safety issue while maintaining high-voltage charging capability
Solution Approach 2:
The patent extracts the reverse current blocking function into a separate switching element module. This switching element is specifically designed to block reverse current while allowing forward current to pass through, separating the protective function from the charging function
2Stability of the object's composition
If various control sequences and structures are added to prevent problems during charging, then system stability is improved, but the system cannot detect or prevent all various problems that may occur during the battery charging process
Solution Approach 1:
The patent implements preliminary detection actions by continuously monitoring terminal voltages before problems occur. The charging controller detects connection status and abnormal conditions (such as short circuits or disconnections) in advance through voltage sensing, enabling preventive action before actual failures happen
Solution Approach 2:
The patent establishes a feedback mechanism where the charging controller continuously monitors terminal voltages and adjusts charging parameters accordingly. The determination unit provides feedback about connection status to the control logic, enabling real-time adaptation to maintain both stability and reliability
3Reliability
If a switching element is introduced to control current flow, then reverse current blocking capability is improved, but the complexity of the charging controller increases
Solution Approach 1:
The switching element in the patent is designed to perform multiple functions: it blocks reverse current, controls charging current flow, and enables voltage detection for connection status monitoring. By making the switching element multi-functional, the patent reduces overall system complexity while maintaining reliability
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
The solution improves the stability of the charging system by preventing reverse current and accurately determining connection statuses, enhancing safety and preventing potential charging issues.
Implementation Method 1
a diode having a cathode terminal electrically connected to a base terminal of the switch
Implementation Method 2
a voltage distribution unit configured to distribute a voltage supplied by a first power source of the electric vehicle by a plurality of resistors electrically connected to the second port
Data Source
AI summary
An electric vehicle charging controller according to an embodiment of the present invention comprises: a switch; a first resistance having a first end connected to a collector terminal of the switch and a second end connected to a first power; a second resistance having a first end connected to a collector terminal of the switch and a second end connected to a signal output terminal; a third resistance having a first end connected to the second end of the second resistance and a second end connected to a first ground terminal; and a diode having a cathode terminal electrically connected to a base terminal of the switch. An emitter terminal of the switch is electrically connected to a second ground terminal of a power supply device.