Battery Pack Post-Charge Balancing for High-Voltage Saturation Control
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Solution Overview
Problem
Rechargeable batteries in a pack often suffer from imbalance in impedance, voltage, and power, leading to reduced service life due to excessive charging and long-term high-temperature, high-pressure electricity-saturation states.
Innovation Solution
A method that continuously detects the voltage of each battery in a pack after full charge and performs discharge or balance operations based on predetermined voltage differences to balance the batteries, reducing the stored voltage and preventing high-voltage saturation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If rechargeable batteries are connected in series to form a battery pack, then the voltage and power requirements are met, but voltage imbalance appears among batteries leading to reduced service life
Solution Approach 1:
The patent implements a feedback mechanism by continuously detecting the voltage of each battery in the pack and comparing it with reference values. Based on the detected voltage differences, the system automatically adjusts charging parameters or performs balance operations to correct imbalances, ensuring all batteries operate within safe voltage ranges and extending overall pack service life.
Solution Approach 2:
The patent performs preliminary balance operations during the charging process before voltage imbalance becomes severe. By detecting voltage differences early and applying balance charging to lower-voltage batteries, the system prevents excessive voltage deviation that would otherwise lead to reduced service life and safety issues.
2Power
If batteries are charged to high voltage to meet power requirements, then power output is improved, but batteries enter high-temperature high-pressure electricity-saturation state reducing service life
Solution Approach 1:
The patent dynamically adjusts charging parameters including voltage thresholds, charging current, and temperature limits based on real-time battery state detection. By changing these parameters adaptively, the system optimizes power output while preventing batteries from entering harmful high-temperature high-pressure saturation states, thus extending service life.
Solution Approach 2:
The patent implements periodic voltage detection and balance operations during charging cycles. By periodically checking battery voltages and performing intermittent balance charging, the system maintains batteries in optimal states without continuous high-voltage stress, reducing thermal accumulation and extending service life while still meeting power requirements.
3Stability of the object's composition
If balance operation is performed continuously to maintain voltage equality, then voltage balance is improved, but charging time and energy loss increase
Solution Approach 1:
The patent applies partial balance operations only to batteries that fall below a predetermined voltage threshold, rather than continuously balancing all batteries. This selective approach maintains sufficient voltage balance while minimizing additional charging time and energy loss, achieving an optimal compromise between balance stability and charging efficiency.
4Reliability
If voltage detection and balance operations are implemented, then battery service life is extended, but system complexity increases
Solution Approach 1:
The patent designs the control system to perform multiple functions using integrated circuitry: voltage detection, balance control, and protection operations are all handled by the same control unit. This multi-functional approach extends battery service life through comprehensive monitoring and control while minimizing the increase in system complexity by avoiding separate dedicated circuits for each function.
Data Source
AI summary
The battery pack with the plurality of batteries is determined to have been fully charged and set in a stationary state, the discharge operation proceeds according to specified relationships of the voltage of each battery, a first predetermined voltage difference, and a discharge starting voltage, or the balance operation proceeds according to specified relationships of the voltage of each battery, the first predetermined voltage difference, a balance starting voltage and a second predetermined voltage difference. The expected lifespans of batteries are prolonged whereby to decrease the stored voltage of each fully-charged battery and reduce the time storing of high-voltage electricity-saturation batteries