Jumper Cable Control for Polarity Detection and Safe Jump Starts
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Solution Overview
Problem
Existing jumper cables, such as MOS tube-controlled and power diode-controlled types, face challenges in starting vehicles with large displacements, risk overheating, and fail to detect ignition completion, while straight-through cables lack reverse connection protection.
Innovation Solution
A jumper cable device with a main body, input port, and clamps, featuring a control apparatus that includes a microcontroller unit, clamp polarity detection, and relay switches, allowing automatic polarity determination and safe connection to vehicle batteries without specific polarity confirmation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MOS tube-controlled or power diode-controlled jumper cables are used, then ignition control function is provided, but the cables cannot start vehicles with large displacement and are prone to overheating
Solution Approach 1:
The patent introduces a control apparatus as an intermediary between the power source and the clamps. This control apparatus includes a microcontroller unit that manages the power flow, and relay switches that act as intermediaries to connect or disconnect the clamps from the power source, preventing direct overheating of the jumper cable conductors while maintaining ignition control functionality
Solution Approach 2:
The patent replaces the traditional MOS tube or power diode control mechanism with a microcontroller-based electronic control system. This substitution allows for more precise control of the ignition process, enabling the system to handle larger displacement vehicles by intelligently managing power delivery without excessive heat generation
2Reliability
If MOS tube-controlled or power diode-controlled jumper cables are used, then ignition control is provided, but the cables fail to detect ignition completion and cannot disconnect the ignition circuit
Solution Approach 1:
The patent implements a feedback mechanism where the microcontroller unit monitors the electrical parameters (such as current or voltage) to detect when the ignition process is complete. Based on this feedback information, the control apparatus automatically disconnects the clamps from the power source via the relay switches, eliminating the need for manual disconnection and preventing the ignition circuit from remaining connected
Solution Approach 2:
The control apparatus performs self-service by automatically detecting ignition completion and disconnecting the circuit without requiring external intervention. The microcontroller unit continuously monitors the system state and autonomously manages the disconnection process, making the system self-regulating
3Ease of operation
If straight-through jumper cables are used, then simple connection is provided, but no reverse connection protection is given
Solution Approach 1:
The patent applies preliminary action by having the control apparatus detect the polarity of the connected battery terminals before allowing power flow. The microcontroller unit identifies the positive and negative terminals in advance, and only enables power transmission when the connection is correct, preventing reverse connection damage before it can occur
Solution Approach 2:
The control apparatus acts as an intermediary between the power source and the clamps, inserting itself into the circuit to provide intelligence. This intermediary layer includes polarity detection circuitry that mediates the connection process, ensuring reverse connection protection while maintaining ease of use through automatic detection
4Ease of operation
If a first connector is designed to connect in two directions, then ease of use is improved, but connector design complexity increases
Solution Approach 1:
The patent employs asymmetry in the connector design where the first connector features a symmetrical contact arrangement that allows it to make proper electrical contact with the second connector regardless of insertion direction. The internal contact layout is designed asymmetrically relative to the outer housing, enabling functional symmetry (bidirectional connection) through asymmetric internal structure
Data Source
AI summary
Disclosed are a jumper cable device and a jump start system. The jumper cable device includes a main body, and an input port, a first clamp and a second clamp connected to the main body, wherein the input port is configured to be connected with an external startup power source, and the first and second clamps are configured to be connected to a battery of a load, wherein the main body includes a housing and a control apparatus received within the housing, and the control apparatus is connected in circuit between the input port and the first and second clamps, and the input port is configured as a first connector, and wherein the first connector is connectable to a second connector of the startup power source in two directions.