Vehicle Charge-Discharge Circuit for Starting Battery Overcharge Blocking
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Solution Overview
Problem
The starting power supply in vehicles is prone to overcharge when the output voltage of the generator cannot be adjusted, leading to overcharge failure, which causes load abnormalities and safety accidents when disconnected from the main circuit to prevent further charging.
Innovation Solution
A charge-discharge control circuit with a main positive switch unit and battery management module that detects the voltage of the starting power supply and controls the current direction to prevent overcharging, allowing the supply to continue powering loads while blocking the charging loop when fully charged, ensuring stable voltage output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the generator continues to charge the starting power supply after full charge, then charging function is maintained, but overcharge failure occurs
Solution Approach 1:
The patent implements a feedback mechanism where the charge state detection circuit continuously monitors the charge state of the starting power supply and provides feedback to the switch control circuitry. When the starting power supply reaches full charge, the detection circuit signals the control circuitry to activate the first switch, which then blocks the charging path. This feedback loop ensures that the generator can continue its charging function while the system automatically prevents overcharging based on real-time charge state monitoring.
2Reliability
If a switch control circuitry is introduced to manage charge-discharge, then overcharging is prevented and power supply stability is maintained, but device complexity increases
Solution Approach 1:
The patent extracts the control function from the main circuit by introducing separate switch control circuitry that independently manages the charging and power supply paths. The first switch control circuitry manages the charging path while the second switch control circuitry manages the power supply path. This extraction of control functions allows the main circuit to maintain its simple power transmission role while the separate control circuitries handle the complexity of charge-discharge management, thereby preventing overcharging and maintaining power supply stability without significantly complicating the overall system.
Data Source
AI summary
A charge-discharge control circuit, method, device and a storage medium are provided. In some embodiments, the circuit includes: a starting power supply; and a main positive switch unit. In those embodiments, a first terminal of the main positive switch unit is connected to the starting power supply, and a second terminal of the main positive switch unit is connected to a generator of the vehicle and a load of the vehicle. The main positive switch unit is configured to interrupt a current in a first current direction, which is a current direction when the generator charges the starting power supply. The circuit also includes a battery management module configured to detect a voltage of the starting power supply, and control the main positive switch unit to interrupt the current in the first current direction when the voltage of the starting power supply reaches a preset voltage threshold.