Battery Cluster Voltage Detection for PCS Connection Errors
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Solution Overview
Problem
The existing energy storage systems face challenges in maintaining and expanding the connection between battery clusters and power conversion units, leading to potential connection errors during installation, which can result in system malfunction or explosion.
Innovation Solution
An energy storage system with a first control unit that sends instructions to battery clusters to change output voltages and determines connection relationships by comparing input voltages before and after the instruction, using switch circuits to connect or disconnect battery packs, thereby identifying correct connections and preventing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If battery clusters and power conversion units are made as two separate modules, then maintenance and system expansion become easier, but connection errors may occur during installation
Solution Approach 1:
The patent applies preliminary action by pre-assigning unique identifiers to battery clusters and power conversion units before installation. The detection mechanism is pre-configured to automatically verify connections by matching these identifiers, ensuring correct pairing before the system becomes operational and preventing connection errors from occurring in the first place
Solution Approach 2:
The patent implements feedback through an automatic detection mechanism that verifies connection relationships between battery clusters and power conversion units. The system provides real-time feedback on connection status, alerting operators to any mismatches or errors, thereby ensuring reliable connections while maintaining modular flexibility
2Reliability
If battery clusters and power conversion units are made as a whole, then connection errors are avoided, but maintenance and system expansion become difficult
Solution Approach 1:
The patent applies segmentation by dividing the integrated system into distinct modular components (battery clusters and power conversion units) that can be independently maintained and replaced. Each module retains unique identifiers that enable automatic detection and verification of correct reconnections after maintenance or expansion activities
Solution Approach 2:
The detection mechanism provides continuous feedback on connection status, ensuring that even though modules are separated for maintenance purposes, they are correctly reconnected afterward. This feedback loop maintains connection reliability while enabling modular maintenance and system expansion
3Reliability
If connection detection is performed after system installation, then connection errors can be identified, but system operation may be delayed
Solution Approach 1:
The patent performs connection detection as a preliminary action during the installation and commissioning phase, before full system operation begins. By detecting and verifying all connection relationships upfront using automated identifier matching, the system ensures reliability is established before operation, minimizing delays to actual system uptime
Solution Approach 2:
The patent replaces manual connection verification methods with an automated electronic detection system that uses unique identifiers and electronic communication to verify connections. This substitution dramatically reduces the time required for connection detection compared to manual methods, while maintaining high reliability
Data Source
AI summary
This application provides an energy storage system and an energy storage system detection method. The method includes: A first control unit sends a first instruction to a first battery cluster to change an output voltage of the first battery cluster. The first control unit obtains a first input voltage and a second input voltage that are of each of a plurality of power conversion units. The first control unit determines, based on the first instruction, and the first input voltage and the second input voltage that are of each of the plurality of power conversion units, whether each of the plurality of power conversion units is connected to the first battery cluster. On this basis, whether there is a connection error in the energy storage system is determined. Then, a security risk in the system is eliminated.