Vehicle Battery Leakage Detection Circuit Topology

The patent implements periodic switching of the isolation switch to enable measurement cycles. The switch alternates between connected and disconnected states, allowing the system to perform leakage resistance measurements periodically without maintaining a permanent leakage path. This temporal separation resolves the contradiction by enabling accurate measurements only when needed while preventing continuous leakage.

The system performs preliminary checks to determine whether leakage detection is needed before activating the measurement circuit. By anticipating measurement requirements and preparing the circuit state in advance, the system can enable isolation switches only when measurements are required, thereby maintaining measurement precision while minimizing the time switches are active and reducing overall complexity.

The isolation switch serves multiple functions: it acts as a measurement enable switch, a safety isolation device, and a leakage prevention mechanism. By making the switch multi-functional, the patent reduces the need for separate components for each function, thereby improving reliability through comprehensive safety coverage while reducing manufacturing costs through component consolidation.

The control system automatically manages the isolation switch based on operational conditions, performing safety checks and measurements without requiring manual intervention. The system self-regulates when to enable or disable the switch, ensuring reliability is maintained while minimizing the need for additional safety components that would increase manufacturing cost.

The patent implements periodic monitoring of leakage resistance rather than continuous monitoring. The isolation switch and measurement circuit are activated at predetermined intervals or under specific conditions, allowing the system to maintain reliability through regular safety checks while significantly reducing energy consumption compared to continuous monitoring approaches.

The monitoring frequency and intensity are dynamically adjusted based on operational conditions. The system increases monitoring intensity when anomalies are detected or during critical operational phases, and reduces monitoring during normal stable operation, thereby maintaining reliability while optimizing energy consumption according to actual system needs.