Emergency Jump Starter Short-Circuit Detection by High-Frequency Monitoring
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Solution Overview
Problem
Existing emergency starting power supplies for vehicles face challenges in accurately and quickly distinguishing between short-circuit and normal conditions, leading to potential damage from misjudgment, as existing methods rely on long waiting times or temperature-based shutdowns, which are prone to environmental influences and vary with different vehicle starting characteristics.
Innovation Solution
A method and system that continuously measures electrical parameters at a high frequency, determines abnormality based on parameter changes and directions, and implements protection when a preset number of abnormalities is reached, using a control device to disconnect the battery from the connection port, with modules for data acquisition, comparison, counting, and state-of-charging exclusion to ensure accurate and timely short-circuit detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If automatic shutdown after exceeding preset time is used during starting process, then short-circuit protection is implemented, but protection response time is long causing internal component damage
Solution Approach 1:
The patent applies preliminary action by continuously monitoring electrical parameters (voltage, current, power) at high frequency before a short-circuit causes damage. The system pre-establishes protection by detecting abnormal parameter changes and their trends, enabling early intervention before the preset time expires or temperature rises, thus resolving the contradiction between protection effectiveness and response time.
2Reliability
If fixed waiting time is used for short-circuit detection, then protection is implemented, but power supply may be damaged in vehicles with different starting characteristics
Solution Approach 1:
The patent applies dynamics by replacing the fixed waiting time with dynamic parameter monitoring that adapts to different vehicle starting characteristics. The system continuously tracks voltage, current, and power parameters at high frequency, detecting abnormal changes and their trends in real-time. This dynamic approach allows the protection mechanism to respond appropriately to various starting scenarios without being constrained by a universal fixed time threshold.
3Reliability
If temperature detection of short-circuit heating parts is used, then protection is implemented, but shutdown occurs only after short-circuit impact and misjudgment is prone due to environmental factors
Solution Approach 1:
The patent applies mechanics substitution by replacing the thermal detection mechanism with electrical parameter monitoring. Instead of measuring temperature (thermal field) after heating occurs, the system monitors voltage, current, and power (electrical field) parameters in real-time. This substitution enables early detection of short-circuits through abnormal electrical parameter changes and their trends, eliminating the time delay inherent in thermal detection and reducing susceptibility to environmental temperature variations.
4Measurement precision
If high temperature operation is allowed for short-circuit detection, then detection sensitivity is improved, but storage battery service life is shortened
Solution Approach 1:
The patent applies mechanics substitution by replacing thermal-based detection with electrical parameter monitoring. The system detects short-circuits through abnormal changes in voltage, current, and power parameters and their trends, eliminating the need to operate the battery at high temperatures for enhanced detection sensitivity. This approach maintains detection precision while avoiding the harmful thermal effects that would reduce battery service life.
Data Source
AI summary
Disclosed are a method and system for short-circuit protection of emergency starting power supply. An electrical parameter of an emergency starting power supply is detected multiple times at a relatively high frequency, so as to identify whether there is an exception according to the change difference and change direction of the electrical parameter, whether the emergency starting power supply is short-circuited according to the counting determination results, and then exception protection is implemented, so that a normal start state and a short-circuit state are effectively distinguished, thereby avoiding damage caused by a short circuit. The present disclosure has good adaptability and can be adapted to various start power supplies and automobile start loads, and it can be combined with an existing starting power supply circuit structure, an additional sensing device is not required, thereby improving the use safety and experience of the emergency starting power supply.