Battery Pack Dynamic Charging Current Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional battery charger systems fail to recharge battery packs optimally and efficiently due to lack of control over charging current based on battery conditions such as temperature and internal resistance.
Innovation Solution
A rechargeable battery pack system that includes a voltage detector, calculator, and communicator to determine optimal charging current values and transmit them to the battery charger, allowing the battery charger to supply currents accordingly, thereby controlling the recharging process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery charger controls charging voltage and current using conventional CCCV method, then the charging process is simple to implement, but the battery cannot be recharged optimally according to its specific conditions such as temperature and internal resistance
Solution Approach 1:
Instead of the battery charger controlling the charging parameters unilaterally, the patent inverts the control relationship by having the battery pack determine and communicate its optimal charging current values to the charger. The battery pack includes a calculator that computes optimal charging currents based on its internal conditions (temperature, internal resistance, charge state), and a communicator that transmits these values to the charger, which then supplies current accordingly.
2Productivity
If the battery charger uses fixed charging current, then the charging system is simple to operate, but the charging time is extended and battery life is reduced
Solution Approach 1:
The patent implements dynamic charging current adjustment by equipping the battery pack with a calculator that continuously determines optimal charging current values based on real-time battery conditions (temperature, internal resistance, charge state). This dynamic calculation and communication of optimal current values allows the charging system to adapt to changing battery conditions, enabling faster charging when conditions permit while protecting the battery when conditions require caution.
3Adaptability or versatility
If the battery charger monitors only charging voltage and current, then the monitoring system is simple, but the battery cannot be recharged appropriately depending on temperature and internal resistance conditions
Solution Approach 1:
The battery pack performs self-diagnosis and self-determination of optimal charging parameters by including internal detectors (voltage, temperature, internal resistance) and a calculator that computes optimal charging currents based on its own condition. The battery pack essentially serves itself by determining what charging parameters it needs, then communicates these requirements to the charger, eliminating the need for complex charger-side monitoring and decision-making systems.
Data Source
AI summary
A battery pack includes: a plurality of rechargeable batteries (11a to 11n) connected in series or in parallel; a voltage detector (13) for detecting voltages of the respective batteries; a calculator (15) for calculating optimal charging current values based on the voltages of the respective batteries detected by the voltage detector so as to recharge the respective batteries; and a communicator (19) for transmitting the charging current values calculated by the calculator to a battery charger (3).