Battery Charging Circuit Dynamic Current Control
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Solution Overview
Problem
Existing battery charging technologies face instability due to voltage fluctuations during charging current adjustments, leading to ineffective charging and equipment instability, especially when the charging power source's load capacity and fluctuation features do not match the battery's requirements.
Innovation Solution
A battery charging device with a charging circuit and a charging current control circuit that adjusts the charging current gradually by setting the equivalent resistance values through a general register, using multiple switching tubes and resistances to smoothly manage voltage changes, ensuring stable charging even with varying load capacities and fluctuation features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If constant current charging is used, then charging simplicity is maintained, but charging power source adaptability deteriorates
Solution Approach 1:
The patent implements dynamic charging current adjustment by detecting the voltage drop of the charging power source and automatically modifying the charging current in real-time. The charging current is no longer fixed but dynamically adapted to match the load capacity of different power sources, resolving the contradiction between operational simplicity and power source adaptability.
Solution Approach 2:
The patent changes the charging current parameter based on the detected voltage drop characteristics of the charging power source. By adjusting the current parameter dynamically according to the power source's load capacity, the system achieves adaptability across different power sources while maintaining simple constant current charging operation.
2Productivity
If charging current is increased to maximize power source utilization, then charging efficiency improves, but voltage stability deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the voltage drop of the charging power source is continuously detected and used to adjust the charging current. This closed-loop control ensures that the charging current is optimized for efficiency while automatically adapting to voltage stability constraints, as the system responds to voltage changes by adjusting current accordingly.
Solution Approach 2:
The patent applies preliminary anti-action by detecting voltage drop trends and preemptively adjusting the charging current before excessive voltage fluctuations occur. This preventive approach maintains voltage stability while maximizing charging efficiency by operating near the optimal current level without causing instability.
3Adaptability or versatility
If charging current is adjusted dynamically, then power source adaptability improves, but device complexity increases
Solution Approach 1:
The patent implements self-service by enabling the charging device to automatically detect voltage drop characteristics and adjust charging current without external intervention. The control circuit autonomously adapts to different power sources, achieving high adaptability while keeping the user interface simple and the control logic self-contained.
Solution Approach 2:
The patent creates a universal charging solution where a single charging device can work with multiple power sources of different load capacities. The control circuit performs multiple functions: voltage drop detection, current calculation, and current adjustment, all within one integrated system that adapts to any connected power source.
4Reliability
If voltage drop detection is implemented, then charging stability improves, but measurement precision requirements increase
Solution Approach 1:
The patent applies partial action by detecting only the voltage drop component caused by current draw rather than requiring absolute precision measurements. The system measures the change in voltage under load conditions, which is sufficient for determining appropriate charging current without demanding extremely high measurement precision across the entire voltage range.
Data Source
AI summary
The present invention is adapted for the field of power supply and provides a battery charging device and a method for controlling charging thereof, including: a charging circuit which has a charging current setting terminal for charging the battery according to charging current of the charging current setting terminal; a charging current control circuit which is connected with the charging current setting terminal and adjusts the charging current gradually according to equivalent resistance in the charging current control circuit; a general register circuit which is connected to the charging current control circuit and to control the equivalent resistance by setting value of a general register. In the present invention, a plurality of switching tubes and resistances are integrated into the charging current control circuit. The switching tubes is switched on or off by setting the value of the general register, thereby adjusting the existing charging current gradually and causing the voltage of the charging power source to descend/ascend smoothly. This provides a solution to the problem of equipment instability caused by the voltage fluctuation in the adjustment process of charging current in the existing technology.