High-Voltage Damper Transient Detection for EV Network Protection
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Solution Overview
Problem
Existing methods for detecting transients produced by high-voltage components in electric vehicles, particularly high-voltage dampers, are costly, difficult, and location/time-dependent, making it challenging to design adequate protection for other high-voltage components in the network.
Innovation Solution
A method and device for detecting transients in high-voltage dampers using a loading device coupled to the damper's hydraulic unit, simulating vertical dynamics through a time-dependent force, allowing transient detection independently of location and time, and facilitating the design of protective capacitors or filters for other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If transients are detected using existing methods, then the influence of high-voltage components on the high-voltage network can be measured, but the detection process is costly, difficult, and location/time-dependent
Solution Approach 1:
The patent uses a loading device that replicates real road conditions and vertical dynamics in a controlled test environment, creating a simplified copy of actual operating conditions. This allows transient detection without needing to test on actual roads under various conditions, reducing complexity while maintaining measurement accuracy
Solution Approach 2:
The patent replaces complex field testing with a controlled mechanical loading system that applies predetermined forces to the high-voltage damper. This substitution of actual road testing with a mechanical test bench simplifies the detection process while maintaining the ability to measure transients accurately
2Reliability
If capacitors or electronic filters are added to protect high-voltage components against transients, then component reliability improves, but costs and system complexity increase
Solution Approach 1:
The patent performs transient detection and analysis during the design and development phase, before the vehicle enters production. This preliminary assessment allows engineers to determine exactly what level of protection is needed, avoiding both over-protection (unnecessary complexity) and under-protection (insufficient reliability)
Solution Approach 2:
The patent uses the measured transient characteristics (voltage, current, frequency, amplitude) to optimize the design parameters of protective components. By basing component specifications on actual measured data rather than conservative estimates, the system achieves necessary reliability with minimal complexity
3Productivity
If the high-voltage damper operates in limit regions of vertical dynamics, then suspension performance is optimized, but damaging transients are generated
Solution Approach 1:
The patent detects and characterizes the harmful transients generated during limit operation, enabling designers to implement protective measures in advance. By identifying the specific conditions and magnitude of damaging transients during development, appropriate protection can be built into the system before production
Solution Approach 2:
The patent uses the naturally occurring transients during high-performance suspension operation as test data to improve overall system design. The harmful transients become valuable information for sizing protective components, ensuring they are adequately designed for worst-case scenarios without requiring separate extreme testing
Data Source
AI summary
A method for detecting a transient of a voltage damper of an electric vehicle, wherein an electric vehicle is provided, having a voltage network and a voltage damper connected to the voltage network, and a measurement device connected to the voltage network detects a transient produced by the voltage damper as a result of a loading, a method for designing a voltage component of a voltage network of an electric vehicle, and a device for loading a voltage damper of an electric vehicle.