Charging Control Device for Battery Overcharge Prevention
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Solution Overview
Problem
Excessive and unnecessary charging of battery-powered devices leads to energy wastage, reduced battery lifespan, and increased risk of fire due to continuous charging beyond full capacity and standby current consumption.
Innovation Solution
A charging control device that detects the maximum charging current, sets a threshold, and automatically disconnects the charging when the current decrease becomes gentle, ensuring the battery is fully charged without unnecessary extension, thereby saving energy and preventing overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the charging operation continues until the battery is fully charged, then the battery capacity is maximized, but the charging time is extended considerably beyond what is required
Solution Approach 1:
The system continuously monitors the charging current and detects when it drops below a predetermined threshold, indicating that the battery is fully charged. This feedback mechanism automatically terminates the charging operation at the optimal moment, preventing both undercharging and excessive charging.
Solution Approach 2:
The system establishes a predetermined current threshold before charging begins. This preliminary setting allows the system to automatically recognize when charging is complete based on the characteristic current drop that occurs when a battery reaches full capacity, eliminating the need for user monitoring.
2Ease of operation
If the charger remains connected to the mains current when not needed, then the device is ready for immediate use, but unnecessary energy is consumed
Solution Approach 1:
The system automatically detects when charging is complete and terminates the charging operation without user intervention. The charger also automatically disconnects from mains power when not in use, eliminating the need for user action while preventing energy waste.
Solution Approach 2:
The system uses current monitoring feedback to detect both charging completion and idle states, automatically adjusting its operation to eliminate unnecessary energy consumption while maintaining readiness when needed.
3Speed
If excessive charging current is supplied to the battery, then the charging speed is increased, but the battery lifetime is reduced and fire risk increases
Solution Approach 1:
The system dynamically adjusts the charging operation based on real-time current monitoring. When the battery approaches full capacity, the charging current naturally decreases, and the system detects this change to terminate charging at the optimal point, preventing overcharging that would reduce battery lifespan or create safety hazards.
4Loss of time
If the user manually monitors the battery charge percentage, then the charging can be stopped at the right time, but user effort is required and charging may still extend longer than necessary
Solution Approach 1:
The charging system performs self-monitoring by continuously detecting the charging current and automatically determining when charging is complete. This eliminates the need for user monitoring while ensuring charging stops at the optimal moment, combining ease of operation with time optimization.
Solution Approach 2:
The system implements automatic feedback-based control by monitoring charging current and terminating charging when the current drops below the predetermined threshold, eliminating manual user intervention while achieving optimal charging duration.
Data Source
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AI summary
It is an object to provide a charging control device. In an embodiment, a device comprises: a detector con- figured to detect a charging current of a battery of an electrical device and to determine charging current values in relation to the charging current; a switch configured to connect and disconnect the charging; a controller configured to detect a maximum value of the charging current values; after detecting the maximum value, the controller is further configured to detect a threshold current value of the charging current values; after detecting the threshold current value, the controller is configured to detect a change of subsequent values of the charging current values, and based on the change to detect whether the change exceeds a threshold change value; after detecting the exceeding of the threshold change value, the controller is further configured to control the switch for disconnecting the charging. Other embodiments relate to a method and a computer program for controlling a charger device.