Jumper Cable Bypass Detection for Low-Voltage Battery Starting
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Solution Overview
Problem
Existing jumper cables for emergency vehicle starts fail to identify low voltage vehicle batteries, leading to potential short circuits and increased battery aging, and require manual operation which can result in overheating or fire.
Innovation Solution
A jumper cable system with a bypass module and microcontroller that pre-charges the battery to determine if it's real, then connects the main charging circuit only when the battery meets a preset voltage condition, avoiding short circuits and reducing manual operation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the jumper cable is forcedly switched on by means of a button when battery detection fails, then the vehicle can be ignited, but the operation complexity is increased and short circuit risk arises
Solution Approach 1:
The system performs preliminary battery detection through voltage measurement and short-circuit testing before enabling the forced switch-on function. This preliminary action identifies valid batteries and prevents short circuits, allowing the forced switch-on button to be safely used only when detection confirms a real battery is present.
Solution Approach 2:
The control unit acts as an intermediary between the detection system and the switching mechanism. It processes detection results and intelligently controls the switching circuit, enabling forced switch-on only when detection confirms safety, thus resolving the contradiction between operational ease and reliability.
2Reliability
If the jumper cable remains connected for 30 s or longer to ensure vehicle start, then the vehicle can be normally started, but the vehicle battery generates large current that uses up starting power supply capacity and accelerates battery aging
Solution Approach 1:
The system continuously monitors battery voltage during the connection period and uses this feedback to dynamically adjust the disconnection timing. When voltage stabilizes within the normal range, the system automatically disconnects, avoiding unnecessary extended connection time and reducing energy consumption while ensuring reliable vehicle start.
Solution Approach 2:
The connection duration is made dynamic rather than fixed at 30 seconds. The system adapts the connection time based on real-time battery state detection, extending connection only as long as necessary to achieve successful start, thereby reducing energy consumption while maintaining reliability.
3Measurement precision
If the jumper cable detects voltage drop to identify battery connection status, then the starting power supply can communicate with the battery, but when battery voltage is very low (less than 0.2V), the battery presence cannot be identified and the jumper cable will not switch on
Solution Approach 1:
The system performs preliminary short-circuit testing before relying on voltage measurement. By momentarily creating a controlled short circuit and measuring the resulting current, the system can identify battery presence even when voltage is extremely low (below 0.2V), expanding adaptability while maintaining measurement precision through alternative detection methods.
Solution Approach 2:
The system changes the detection parameter from voltage-only measurement to current-based short-circuit testing when voltage is too low. This parameter change enables detection of batteries with voltage below 0.2V, resolving the contradiction between measurement precision and adaptability across different battery states.
Data Source
AI summary
A starting power supply device for a vehicle includes a battery portion; output terminals, configured to be connected to a vehicle or vehicle battery; a switching circuit, connected in circuit between the battery portion and the output terminals; a bypass module, connected in circuit between the battery portion and the output terminals; and a first microcontroller, connected to the switching circuit and the bypass module. The first microcontroller is configured to control the bypass module to be switched on to identify whether the vehicle or vehicle battery connected to the output terminals is real and effective, and control the switching circuit to be switched on when the vehicle or vehicle battery connected to the output terminals is real and effective, to connect the battery portion with the vehicle or vehicle battery.