Charge Protection Circuit With Abnormal Charging Detection
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Solution Overview
Problem
Existing chargers may fail to appropriately respond to abnormal operations within the charging circuit, leading to potential overheating and other issues due to inadequate safety mechanisms.
Innovation Solution
A charge protection circuit that includes a switch, a detector for current and voltage monitoring, and a controller to interrupt power supply when abnormal conditions are detected, ensuring safe charging and preventing overcharging or short-circuit currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a charger uses basic voltage supply interruption mechanisms, then it can prevent overcharging from external power sources, but it fails to detect and respond to abnormal operations within the charging circuit itself
Solution Approach 1:
The patent implements a feedback mechanism where the detector continuously monitors current and voltage parameters during charging, and the controller adjusts the charging state based on detection results. When abnormal conditions are detected (such as short-circuit current or overheating), the system automatically interrupts power supply, creating a closed-loop safety control system that responds to real-time charging circuit conditions.
Solution Approach 2:
The patent introduces a detector as an intermediary component between the charging circuit and the control system. This detector acts as a mediator that translates physical parameters (current, voltage, temperature) into detectable signals, enabling the controller to perceive and respond to charging circuit conditions without direct physical intervention in the power path.
2Reliability
If a charger implements continuous monitoring of current and voltage, then it can detect abnormal conditions, but it increases the complexity of the charging circuit
Solution Approach 1:
The patent designs the controller to perform multiple functions: it manages normal charging operations, monitors detection signals from the detector, determines abnormal conditions based on detection results, and controls power supply interruption. This multi-functional integration reduces the need for separate dedicated components for each function, thereby limiting the increase in overall system complexity while achieving comprehensive monitoring and control capabilities.
Data Source
AI summary
Disclosed is a charge protection circuit including: a switch that switches between allowing and not allowing power supply from an external power source to a charging circuit that supplies power for charging a rechargeable battery; a detector that detects at least one of a current flowing from the charging circuit to the rechargeable battery and a voltage between two electrodes of the rechargeable battery; a determiner that determines whether a detection result of the detector is abnormal; and a controller that, in response to the determiner determining that the detection result of the detector is abnormal, causes the switch to switch to an interrupting state so as to interrupt power supply to the charging circuit.