Battery Switch Voltage Detection for Short-Circuit Isolation
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Solution Overview
Problem
Existing energy storage systems face challenges in ensuring safety due to potential short-circuits that can occur during installation and operation, which can lead to component damage and increased maintenance costs.
Innovation Solution
A battery control device with multiple switches and controllers is employed to detect short-circuits by monitoring voltage differences across open and closed switches, allowing for immediate detection and disconnection of faulty switches to prevent further damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If voltage monitoring is implemented to detect short-circuits, then safety and reliability are improved, but device complexity increases due to additional switches and controllers
Solution Approach 1:
The battery control device is divided into multiple independent control units, each managing specific battery modules with dedicated switches and controllers. This segmentation allows distributed short-circuit detection without requiring a single complex centralized system, thereby improving reliability while managing device complexity through modular architecture.
Solution Approach 2:
The first switch is configured in an open state during the detection phase before normal operation begins. This preliminary action allows the controller to measure voltage across the open switch terminals to detect short-circuits in the external load or connecting devices before they can cause damage, enabling preventive detection without requiring complex real-time monitoring during operation.
2Ease of operation
If the first switch remains closed for normal operation, then electrical connectivity is maintained, but short-circuit detection becomes impossible
Solution Approach 1:
The first switch dynamically changes its state between open (for detection) and closed (for normal operation). This dynamic switching allows the system to alternate between detection mode and operation mode, maintaining ease of operation during normal use while enabling short-circuit detection when the switch is temporarily opened for measurement purposes.
Solution Approach 2:
The system periodically alternates between detection cycles (first switch open) and operation cycles (first switch closed). During periodic detection intervals, the controller opens the first switch to measure voltage and detect short-circuits, then closes it to restore normal electrical connectivity. This periodic action ensures both operational ease and detection capability are maintained throughout system operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively identifies and prevents short-circuits before they cause damage, reducing maintenance costs and extending the lifespan of the battery systems by automatically detecting and addressing potential faults.
Implementation Method 1
The first controller may be configured to detect a short-circuit between the external load and the first battery control unit, according to a voltage between both ends of the first switch detected with the first switch open and the second switch closed
Data Source
AI summary
A battery control device includes: a first battery control unit configured to control an electrical connection between an external load and a first battery module, the first battery control unit including: a first switch connected between a positive terminal for the first battery module and the external load; a second switch connected between a negative terminal for the first battery module and the external load; and a first controller configured to control an open/closed state of the first and second switches. The first controller may be configured to detect a short-circuit between the external load and the first battery control unit, according to a voltage between both ends of the first switch detected with the first switch open and the second switch closed.