Secondary Battery Deterioration Judgment Without Discharge
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Solution Overview
Problem
Existing secondary battery deterioration judgment methods require discharge to assess deterioration, which disrupts backup power supplies and can lead to insufficient backup time, as they often judge deterioration during discharge, causing a shortage of backup time.
Innovation Solution
A secondary battery deterioration judging device that includes an overdischarge detecting section, a computing section for integrating deterioration values, and a judging section to assess battery state without requiring discharge, using overdischarge detection and integration of overdischarge time and electric amount to determine deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If discharge is performed for deterioration judgment, then deterioration can be assessed, but backup time is insufficient and backup function must be stopped
Solution Approach 1:
The system performs deterioration judgment during charging phases before discharge is needed for backup. By accumulating charge amount data during charging periods and calculating deterioration metrics in advance, the system prepares deterioration assessment results before backup discharge is required, eliminating the need to stop backup operations for judgment purposes
Solution Approach 2:
The system uses charge amount accumulation as an intermediary parameter to assess deterioration without requiring discharge. By measuring and integrating charge amounts during charging phases and using this data to calculate deterioration metrics, the system obtains accurate deterioration assessment without performing discharge that would reduce backup time
2Reliability
If maintenance is implemented to perform discharge for regular deterioration judgments, then deterioration can be monitored, but backup function must be stopped during maintenance
Solution Approach 1:
The system performs deterioration monitoring during regular charging operations before backup is needed. By continuously accumulating charge amount data during charging phases and calculating deterioration metrics in advance, the system maintains reliable deterioration monitoring capability while keeping the backup function continuously available
Solution Approach 2:
The system uses the charging process to serve dual purposes: both charging the battery and accumulating data for deterioration monitoring. The same charging operations that are necessary for battery maintenance also provide the data needed for deterioration assessment, eliminating the need for separate maintenance-discharge operations that would stop backup function
3Measurement precision
If voltage drop measurement is used for deterioration judgment, then internal resistance can be calculated, but discharge must be performed which reduces backup capacity
Solution Approach 1:
The system uses charge amount accumulation during charging as an intermediary to assess deterioration without discharge. By integrating charge amounts during charging phases and using this data to calculate deterioration metrics, the system obtains accurate internal resistance and deterioration information without consuming discharge capacity that would reduce backup capability
Data Source
AI summary
A secondary battery deterioration judging device is provided with an overdischarge detecting section for detecting the overdischarge of a secondary battery, the deterioration of which is to be judged, a computing section for integrating a value indicating the deterioration of the secondary battery while the overdischarge is detected by the overdischarge detecting section, and a judging section for judging a deterioration state of the secondary battery based on an integration value obtained by the computing section.