Battery Balancing Apparatus Using Periodic Control
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Solution Overview
Problem
Battery cells experience voltage and capacity deviations due to chemical and aging differences during charging and discharging, leading to overcharging or over-discharging, which reduces battery capacity and lifespan.
Innovation Solution
A battery balancing method and apparatus that determine state information based on battery quantity data, define balancing parameters including operational states and periods, and apply weights to output values based on deviation information to control balancing units, optimizing balancing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If balancing units are continuously operated to correct voltage and capacity deviations between battery cells, then battery reliability and capacity uniformity are improved, but power consumption increases
Solution Approach 1:
The patent implements periodic balancing operations by determining balancing parameters including balancing periods based on state information ranges. The controller alternates between balancing operations and standby states, performing balancing only when voltage or capacity deviations exceed threshold values. This periodic approach maintains battery reliability by correcting deviations when necessary while reducing power consumption by avoiding continuous operation.
Solution Approach 2:
The patent dynamically adjusts balancing parameters including operational states and balancing periods based on real-time state information of battery cells. The controller determines whether balancing units should operate or remain in standby by evaluating current voltage and capacity deviations. This dynamic adaptation allows the system to optimize between reliability and power consumption by matching balancing intensity to actual battery conditions.
2Duration of action of stationary object
If balancing operations are performed frequently to maintain capacity uniformity, then battery life is extended, but loss of time increases due to repeated balancing cycles
Solution Approach 1:
The patent determines balancing periods based on state information ranges and deviation thresholds. By implementing periodic balancing only when necessary (when deviations exceed thresholds), the system extends battery life through regular maintenance while minimizing time loss by avoiding unnecessary frequent balancing operations.
Solution Approach 2:
The patent uses feedback mechanisms by continuously monitoring state information of battery cells and comparing it against reference values and thresholds. The controller adjusts balancing operations based on this feedback, extending battery life by correcting deviations when detected while minimizing time loss by not performing balancing when the battery is already in a balanced state.
3Manufacturing precision
If balancing parameters are adjusted dynamically based on state information ranges, then balancing precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the state information range into multiple discrete ranges (first range, second range, third range, fourth range) with specific threshold values. This segmentation allows the controller to determine appropriate balancing parameters for each range, improving balancing precision by tailoring operations to specific battery conditions while managing complexity through structured categorization rather than continuous complex calculations.
Solution Approach 2:
The patent changes balancing parameters (operational state and balancing period) based on which state information range is detected. By defining specific parameter sets for each range, the system achieves high balancing precision through parameter adaptation while controlling complexity through pre-defined parameter configurations rather than real-time complex optimization.
Data Source
AI summary
Provided is a battery balancing apparatus and method including determining state information of a battery unit based on battery quantity data of the battery unit, determining a balancing parameter of the battery unit based on a range comprising the state information, and controlling a balancing unit based on the balancing parameter.