Power Storage System Voltage Sensor Connection Verification
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Solution Overview
Problem
Power storage systems face erroneous operations due to incorrect connections between batteries and power converters, leading to potential damage and management system failures.
Innovation Solution
A power storage system with a battery management system that includes a voltage sensor to monitor the voltage between terminals and maintain a main switch in a turn-off state if the sensed voltage exceeds a reference voltage, preventing charge or discharge operations when a wrong connection is detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the battery management system automatically manages charge and discharge operations, then the operation convenience is improved, but the risk of erroneous operations due to wrong connections increases
Solution Approach 1:
The voltage sensor performs preliminary detection of the voltage between the first terminal and fourth terminal before the battery management system initiates charge or discharge operations. The system checks whether this voltage is within the expected range (comparing against reference voltage) in advance, and only allows operations to proceed if the connection is correct. This preliminary action prevents erroneous operations while maintaining automatic management convenience.
2Productivity
If the main switch is kept on for continuous operation, then the productivity is improved, but the risk of damage from wrong connections increases
Solution Approach 1:
The voltage sensor acts as an intermediary detection device that continuously monitors the voltage between the first terminal and fourth terminal. The battery management system uses this intermediate information to dynamically control the main switch, keeping it on for continuous operation when connections are correct, and turning it off when wrong connections are detected, thus balancing productivity and safety.
3Reliability
If additional voltage sensor and control logic are added to detect wrong connections, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The voltage sensor serves multiple functions: it detects the voltage between terminals to identify wrong connections, provides feedback to the battery management system for control decisions, and can be used for general voltage monitoring during operations. This multi-functionality reduces the need for separate dedicated components, minimizing the increase in device complexity while achieving reliable connection verification.
Data Source
AI summary
A power storage system and a method of driving the power storage system and preventing damages due to possible erroneous operations are disclosed. One inventive aspect includes a power converter that converts power, a power storage device that stores power and a main switch that is configured to switch between a charge path and a discharge path. The power storage system controls the main switch by sensing a connection between the power converter and the power storage device.