Power Battery Fault Detection With Switch-Circuit Protection
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Solution Overview
Problem
Current power battery monitoring systems are ineffective in detecting and responding to overload and short-circuit faults in a timely manner, leading to safety risks due to low sensitivity and delayed protection.
Innovation Solution
A control system comprising a switch circuit, sampling circuit, and control circuit connected between a battery pack and bus bar, which monitors temperature and current to determine the state of the power battery and performs corresponding operations, such as disconnecting the switch circuit to prevent damage during short-circuits and adjusting parameters to prevent overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional monitoring systems are used for power batteries, then the system structure is simple, but the fault detection accuracy and response timeliness are poor
Solution Approach 1:
The monitoring system is segmented into three independent functional modules: switch circuit for disconnection control, sampling circuit for parameter acquisition, and control circuit for decision-making. This segmentation allows each module to specialize in specific tasks, improving overall detection accuracy while maintaining manageable system complexity through modular design.
Solution Approach 2:
The sampling circuit acts as an intermediary between the battery pack and the control circuit, acquiring current and temperature parameters and transmitting them to the control circuit. This intermediary layer enables precise fault detection by bridging the gap between physical battery parameters and control decisions, improving measurement precision without requiring direct complex integration.
2Reliability
If passive protection only is used, then the device complexity is low, but the protection timeliness and safety are insufficient
Solution Approach 1:
The control circuit performs preliminary analysis of acquired parameters to identify potential faults before they escalate. By continuously monitoring current and temperature and comparing them against safety thresholds, the system takes preventive action in advance, improving protection timeliness while maintaining reasonable complexity through proactive rather than reactive control.
Solution Approach 2:
The system implements feedback control where the control circuit receives parameter data from the sampling circuit, analyzes the battery state, and sends control signals back to the switch circuit for disconnection or to adjust battery operation. This closed-loop feedback mechanism ensures timely and accurate protection responses, enhancing reliability while the modular architecture keeps device complexity manageable.
Data Source
AI summary
A power battery and a control system and a control method therefor are disclosed. The control system includes a switch circuit, a sampling circuit, and a control circuit. The control circuit is connected to the switch circuit and the sampling circuit and configured to determine a state of the power battery and control performing a corresponding operation according to the state of the power battery.