Battery Charging Apparatus Dynamic Current Adjustment
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Solution Overview
Problem
Conventional constant current and constant voltage charging modes do not allow for sufficient current adjustment, leading to battery deterioration and prolonged charging times, despite efforts to shorten charging time.
Innovation Solution
A charging apparatus and method that adjusts the current based on battery deterioration conditions by adding an additional current beyond the constant current once a predetermined voltage is reached, allowing for faster charging while preventing battery deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large current is supplied to the secondary battery to reduce charging time, then charging speed is improved, but the battery deteriorates due to electrode structure damage or electrolytic liquid degradation
Solution Approach 1:
The patent applies dynamics by transitioning from a static constant current charging mode to a dynamic charging mode where the current is continuously adjusted based on real-time battery state measurements. The charging current varies over time according to the battery's voltage, temperature, and charge level, allowing the system to optimize charging speed while preventing deterioration at different charging stages
Solution Approach 2:
The patent implements parameter changes by modifying the charging current parameter based on multiple battery state parameters including voltage thresholds, temperature ranges, and charge percentage. The system changes the current parameter dynamically - using higher currents when the battery can tolerate them and lower currents when deterioration risks increase, thus resolving the contradiction between charging speed and battery life
2Reliability
If a constant current is used to charge the battery until a predetermined voltage is achieved, then the battery is protected from deterioration, but the charging time is prolonged
Solution Approach 1:
The patent applies periodic action by dividing the charging process into multiple stages or periods with different current characteristics. The charging cycle includes phases of higher current for faster charging followed by phases of lower current for battery protection, creating a periodic pattern that balances speed and longevity. This staged approach allows the system to achieve faster overall charging while maintaining battery health through periodic current adjustment
Data Source
AI summary
A charging apparatus, a charging method, and the like that can prevent deterioration in a battery by appropriate current adjustment and shorten charging time are provided. A charging apparatus (1) performs charging of a battery (31) with a constant current until a voltage of the battery (31) reaches a predetermined voltage and, after the predetermined voltage is achieved, performs charging of the battery (31) while controlling the current so as to keep the voltage constant. A deterioration measuring unit (31) detects a deterioration condition in the battery (31). A current and voltage adjusting unit (11) specifies an additional current in accordance with the deterioration condition. A power supplying unit (12) supplies the additional current to the battery (31) in addition to the constant current. Such a deterioration condition is specified by a voltage difference or a temperature difference detected by supplying a single amount of current for a certain period.