Battery Charge-Discharge Control for Degradation-Based Replacement Timing
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Solution Overview
Problem
The existing power storage systems face challenges in managing the deterioration of storage batteries over time, leading to reduced storage capacity and increased operational costs due to the need for excessive initial investment and premature replacement.
Innovation Solution
A power storage control system that includes a monitoring unit to track deterioration indices for each storage battery and a charge/discharge control unit that adjusts charge amounts or speeds to extend the lifespan of the batteries, thereby optimizing their usage and reducing maintenance costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If storage batteries are installed with excessive initial capacity to account for future deterioration, then the storage capacity during operating period is ensured, but the initial investment cost increases
Solution Approach 1:
The system performs preliminary actions by monitoring deterioration indices and predicting future battery performance before actual capacity deficiency occurs. This allows for proactive replacement planning rather than reactive over-provisioning, enabling users to replace batteries based on actual deterioration rates rather than worst-case assumptions.
Solution Approach 2:
The system implements continuous feedback by monitoring deterioration indices of storage batteries and using this information to adjust replacement timing decisions. This feedback mechanism enables dynamic optimization of replacement strategies based on actual battery performance data, allowing users to delay replacement until necessary while ensuring capacity requirements are met.
2Quantity of substance
If storage batteries are installed with low estimate for extra capacity, then the initial investment cost is reduced, but the storage capacity becomes insufficient at an early stage requiring premature replacement
Solution Approach 1:
The system performs preliminary monitoring and prediction actions to determine the actual replacement timing needed, replacing batteries only when deterioration actually requires it rather than following fixed schedules. This eliminates the need for premature replacement while ensuring capacity sufficiency, reducing costs without compromising reliability.
Solution Approach 2:
The system changes the approach from fixed capacity provisioning to dynamic capacity management by monitoring deterioration indices and adjusting replacement timing based on actual battery performance parameters. This allows optimal balance between initial investment and ongoing capacity sufficiency.
3Reliability
If entire power storage system is replaced when any battery deteriorates, then the system reliability is maintained, but the maintenance cost increases due to unnecessary replacements
Solution Approach 1:
The system segments the power storage system into individual battery units with independent monitoring and replacement decisions. By tracking deterioration indices for each battery separately, the system enables selective replacement of only deteriorated units rather than forcing replacement of the entire system, thereby maintaining reliability while reducing unnecessary maintenance costs.
Solution Approach 2:
The system applies local quality management by monitoring and managing each storage battery individually based on its specific deterioration state. This allows differentiated treatment of batteries based on their actual condition, replacing only those that require it while continuing to use healthy batteries, thus optimizing both reliability and cost efficiency.
4Reliability
If entire power storage system is replaced to avoid capacity deficiency, then the storage capacity requirement is ensured, but the maintenance cost increases due to early replacement
Solution Approach 1:
The system performs preliminary monitoring of individual battery deterioration indices to predict when capacity deficiency will actually occur. This allows planning replacements based on actual deterioration trajectories rather than premature whole-system replacement, ensuring capacity requirements are met while minimizing unnecessary maintenance costs.
Solution Approach 2:
The system uses feedback from continuous monitoring of battery deterioration indices to dynamically determine replacement timing. This feedback enables replacement decisions based on actual system needs rather than fixed schedules, ensuring capacity requirements are maintained while avoiding costly premature replacements.
Data Source
AI summary
A power storage control system reduces the operating cost in a power storage system, and comprises a monitoring section and a charge/discharge control section. The monitoring section monitors a prescribed index value that correlates with the degradation degree of a storage battery for each storage battery included in a plurality of power storage systems. The charge/discharge control section controls the period in which the prescribed index value of each storage battery changes to a prescribed value by degradation accompanying charging and discharging of the storage battery, by performing control relating to at least one of the charge amount or the charge/discharge speed in charging and discharging of the storage battery based on the monitoring results of the monitoring section.