Vehicle Jump Starter Voltage Detection for Safe Current Output
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Solution Overview
Problem
Existing portable backup starting devices for vehicles face issues such as excessive output current and insufficient voltage, which can cause damage to the vehicle circuit or the starting device, particularly when the internal power source is low or overvoltage conditions are present.
Innovation Solution
A portable backup starting device equipped with a first voltage detecting circuit to prevent conduction of the switching circuit when the internal power source voltage is insufficient or excessive, using a microprocessor to control the switching circuit based on preset conditions, and additional circuits for voltage and current detection to ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the switching circuit conducts without voltage detection, then the starting device can operate continuously, but the internal power source may be damaged due to insufficient voltage or overvoltage conditions
Solution Approach 1:
The voltage detecting circuit performs preliminary detection of the internal power source voltage before the switching circuit conducts. The first voltage detecting circuit detects voltage before the switching circuit is turned on, and the second voltage detecting circuit detects voltage before the switching circuit is turned off, preventing damage from overvoltage or undervoltage conditions
Solution Approach 2:
The voltage detecting circuits continuously monitor the internal power source voltage and provide feedback signals to control whether the switching circuit conducts. When the voltage is within the safe range, the switching circuit is allowed to conduct; when the voltage is abnormal, the switching circuit is prevented from conducting
2Power
If the switching circuit conducts without current detection, then the starting device can provide high current output, but excessive output current may damage the vehicle circuit or starting device
Solution Approach 1:
The current detecting circuit performs preliminary detection of the output current before the switching circuit conducts. It detects whether the current exceeds the preset threshold and prevents the switching circuit from conducting when the current is excessive, avoiding damage to the vehicle circuit or starting device
Solution Approach 2:
The current detecting circuit continuously monitors the output current and provides feedback signals to control the switching circuit. When the current is within the safe range, the switching circuit is allowed to conduct; when the current exceeds the threshold, the switching circuit is prevented from conducting
Data Source
AI summary
Provided is portable backup starting device for vehicle. The device includes internal power source, switching circuit, first voltage detecting circuit, first electrode clip, and second electrode clip, wherein the first electrode clip and the second electrode clip are configured to connect to the first end and the second end of vehicle load; the internal power source has first electrode and second electrode, wherein the first electrode is coupled to the first electrode clip, and the second electrode is coupled to the switching circuit; and the switching circuit is coupled to the second electrode clip, wherein the first voltage detecting circuit is coupled to the switching circuit, the first electrode, and the second electrode for detecting first voltage between the first electrode and the second electrode before the switching circuit conducts, and the switching circuit does not conduct when the first voltage meets first preset condition.