Jumper Cable Pre-Charging Circuit for Low-Voltage Vehicle Start
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Solution Overview
Problem
Existing jumper cables fail to identify and start vehicles with very low battery power, leading to potential short circuits and increased manual operation complexity, which can result in overheating or fire hazards.
Innovation Solution
A jumper cable with a bypass charging circuit and a controller that pre-charges the vehicle battery when power is low, allowing the main charging circuit to engage only when a preset voltage condition is met, thereby avoiding short circuits and reducing manual operation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the jumper cable uses voltage detection to identify the vehicle battery, then it can detect battery status, but it fails to identify batteries with very low voltage (below 0.2V)
Solution Approach 1:
The patent changes the detection parameter from voltage alone to a combination of voltage and current characteristics. By measuring both voltage and the current drawn during a brief test period, the system can identify batteries with very low voltage that would otherwise be undetectable, thus improving both measurement precision and reliability
Solution Approach 2:
The patent introduces an intermediary detection mechanism - a test circuit that applies a small test current and measures the resulting voltage drop and current characteristics. This intermediary measurement allows the system to detect batteries below the 0.2V threshold without directly connecting the full charging circuit
2Duration of action of moving object
If the jumper cable keeps the starting power supply connected for 30s to ensure vehicle can be started, then the vehicle has sufficient time to be started, but the vehicle battery generates large current that depletes the starting power supply and accelerates battery aging
Solution Approach 1:
The patent implements dynamic charging duration adjustment based on real-time battery status monitoring. The charging time is not fixed at 30s but is dynamically extended or reduced based on the vehicle battery's actual charge level, voltage recovery rate, and load conditions, optimizing the balance between ensuring start capability and conserving starting power supply energy
Solution Approach 2:
The system continuously monitors battery voltage, current draw, and charging progress, using this feedback to adjust the charging duration in real-time. When the battery reaches sufficient charge level or shows signs of rapid depletion, the system automatically terminates charging early, preventing energy waste
3Ease of operation
If the jumper cable forces switching on by button to ensure vehicle can be started when battery voltage is too low for detection, then the vehicle can be started, but the operation complexity increases and manual judgment errors may cause short circuit
Solution Approach 1:
The patent enables the jumper cable system to automatically detect and handle low-voltage battery scenarios without requiring manual user judgment. The system self-adjusts by switching to alternative detection methods and automatically initiating appropriate charging protocols, eliminating the need for users to press buttons or make manual decisions that could lead to errors
4Power
If the jumper cable connects starting power supply continuously to ensure vehicle can be started within 30s, then the vehicle battery receives sufficient power, but the starting power supply capacity is reduced and battery aging accelerates
Solution Approach 1:
The patent implements periodic charging cycles with monitoring intervals rather than continuous connection. The system charges in controlled bursts, monitors battery response, and adjusts subsequent charging periods accordingly. This periodic approach delivers sufficient total power for starting while allowing the starting power supply to rest and recover, extending its service life
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively identifies and charges vehicles with low battery power, preventing short circuits and reducing the risk of overheating or fire, while extending the life of the starting power supply.
Implementation Method 1
a bypass charging circuit connected between the input terminals and the clamping ends and configured to pre-charge the vehicle battery when being controlled to be switched on
Implementation Method 2
controlling the main charging circuit to be switched on to charge the vehicle battery when it is detected that a relative relationship between an output voltage and an input voltage of the bypass charging circuit meets a preset loading condition such that a vehicle is started and ignited
Data Source
AI summary
The present disclosure is applicable to the technical field of vehicles, and provides a jumper cable for emergency start of vehicles, an integrated starting power supply device, and a vehicle starting method. The jumper cable includes input terminals, clamping ends, and a charging portion. The charging portion includes a main charging circuit, a bypass charging circuit, and a microcontroller. The microcontroller is configured to control the bypass charging circuit to be switched on to pre-charge a vehicle battery and control the main charging circuit to be switched on to charge the vehicle battery when a relative relationship between an output voltage and an input voltage of the bypass charging circuit meets a preset loading condition so as to enable a vehicle to be started and ignited.