Lead-Acid Battery Degradation Estimation Using Inventory Period Data
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Solution Overview
Problem
Existing lead-acid battery degradation diagnosis devices have insufficient estimation accuracy, particularly due to the lack of consideration for the inventory period, which significantly affects the battery's degradation and life prediction.
Innovation Solution
A lead-acid storage device equipped with an estimation device that acquires and stores inventory information, including the inventory period, to accurately estimate degradation based on self-discharge amount and stratified degree, and corrects these estimates using temperature data, thereby improving the accuracy of life prediction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If degradation diagnosis is based only on internal resistance calculation from current and voltage, then the diagnosis method is simple, but the degradation estimation accuracy is insufficient
Solution Approach 1:
The patent applies preliminary action by acquiring and storing inventory information (including inventory period, temperature, charge-discharge history) before the battery is put into service. This pre-collected data is then used by the estimation unit to improve degradation estimation accuracy, addressing the limitation of simple internal resistance-based diagnosis without adding complex real-time measurement systems.
Solution Approach 2:
The patent introduces inventory information as an intermediary element that mediates between the simple internal resistance measurement and accurate degradation estimation. The estimation unit uses this intermediate data (inventory period, temperature history, charge-discharge patterns) to refine the degradation assessment, bridging the gap between simple measurement and precise evaluation.
2Measurement precision
If inventory period information is not considered, then the diagnosis process is simple, but the life prediction accuracy is insufficient
Solution Approach 1:
The system performs preliminary action by collecting inventory information (inventory period, storage temperature, charge-discharge history) during the battery's storage phase before it is put into service. This pre-collected information is stored and later used by the estimation unit to improve life prediction accuracy, ensuring that critical degradation factors are captured before actual usage begins.
Solution Approach 2:
The patent implements feedback by using the collected inventory information to continuously refine and improve degradation and life predictions. The estimation unit processes this feedback data (inventory period effects, temperature exposure, charge-discharge patterns) to adjust and enhance the accuracy of degradation assessments throughout the battery's lifecycle.
Data Source
AI summary
A lead-acid storage device includes a lead-acid battery and an estimation device. The estimation device includes an inventory information acquisition unit that acquires inventory information including an inventory period of the lead-acid battery, a storage that stores the inventory information acquired by the inventory information acquisition unit, and an estimation unit that estimates a degradation amount of the lead-acid battery based on the inventory information stored in the storage.