In-situ Battery Capacity Testing via Pack Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for determining battery energy storage capacity require taking the entire battery system offline, disrupting operations and taking several days, which is inconvenient and affects energy storage services.
Innovation Solution
A system and method that allow for in-situ testing of energy storage capacity by removing only a portion of the energy storage elements from service, enabling the majority of the system to remain operational while capacity is measured, using an energy storage capacity module to test, measure, and manipulate operations based on the results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the entire battery system is taken offline for capacity measurement, then measurement accuracy is improved, but system productivity and operational continuity deteriorate
Solution Approach 1:
The battery system is divided into multiple battery packs, allowing selective offline testing of individual packs while others remain online to provide energy storage services. This segmentation enables parallel operation of testing and service functions, resolving the contradiction between measurement accuracy and system productivity.
Solution Approach 2:
The system performs preliminary identification of candidate battery packs for testing based on usage patterns and state of charge. By pre-selecting appropriate packs for offline testing, the system ensures that service availability is maintained while measurement accuracy is achieved on selected units.
2Measurement precision
If the entire battery system is taken offline for capacity measurement, then measurement completeness is improved, but loss of time and operational disruption worsen
Solution Approach 1:
By segmenting the battery system into testable units (individual battery packs), the system can measure capacity of selected packs without shutting down the entire system. This reduces the time loss and operational disruption compared to taking all packs offline simultaneously.
Solution Approach 2:
The system maintains continuous energy storage service capability by keeping most battery packs online while only taking selected packs offline for measurement. This ensures that useful action (energy storage service) continues uninterrupted, minimizing time loss and operational disruption.
3Measurement precision
If individual battery cells are removed and tested separately with chargers and loads, then cell-level measurement precision is improved, but device complexity and operational difficulty worsen
Solution Approach 1:
The system employs a multi-functional testing apparatus that can test multiple battery packs simultaneously using standardized procedures. This universal testing platform reduces device complexity compared to individual cell testing by handling entire packs with integrated measurement capabilities, eliminating the need for separate chargers and loads for each cell.
Solution Approach 2:
The testing function is merged with the battery management system, allowing capacity measurement to be integrated into existing operational workflows. By combining measurement capabilities with pack-level management, the system reduces operational difficulty while maintaining measurement precision.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
According to some embodiments, system (200) and methods are provided comprising providing an energy storage device (202) including two or more energy storage elements (204, 206, 207); initiating execution of an energy storage capacity module (208) operative to test a capacity of a first energy storage element (204, 206, 207); removing the first storage element (204, 206, 207) from service, while maintaining service of the energy storage device (202); measuring a capacity of the removed storage element (204, 206, 207); receiving the measured capacity at a lifing model (220); executing the lifing model (220) to generate an output; and manipulating operation of the energy storage device (202) based on the generated output.