Dual-Battery Ignition Coil Switching for Low-Charge Reliability
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Solution Overview
Problem
In gasoline vehicles, the ignition coil fails to receive power when the battery state of charge is low or abnormal, leading to potential damage to the catalytic converter and impaired vehicle operation.
Innovation Solution
A system that includes an ignition coil with a primary and secondary coil, a high voltage battery, a low voltage battery, and an electronic element with a battery switch and diode to selectively supply power from either battery, ensuring stable power delivery even when one battery is not functioning normally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only a single battery is used to power the ignition coil, then the system structure is simple, but the reliability is low when the battery state of charge is low or abnormal
Solution Approach 1:
The power supply system is segmented into multiple independent battery units (high voltage battery and low voltage battery), each capable of independently powering the ignition coil. This segmentation allows the system to maintain reliability by switching between power sources while keeping each source relatively simple in structure.
Solution Approach 2:
The system changes the voltage parameter by using two different voltage levels (high voltage and low voltage batteries). The controller detects abnormal conditions and switches between different voltage sources, allowing the ignition coil to operate reliably under varying electrical conditions without requiring a completely complex power management architecture.
2Reliability
If the high voltage battery is used exclusively for ignition coil power, then the power output is sufficient, but the system fails when the high voltage battery operates abnormally
Solution Approach 1:
The system performs preliminary detection of battery abnormalities through the controller, which monitors the state of charge and operational status of the high voltage battery. When abnormalities are detected, the controller proactively switches to the low voltage battery before ignition failure occurs, ensuring continuous and reliable ignition operation.
Solution Approach 2:
The controller acts as an intermediary between the batteries and the ignition coil, managing power source selection and switching. This intermediary component enables the system to adapt to battery abnormalities by intelligently selecting the appropriate power source, thereby enhancing the system's tolerance to battery failures without requiring direct complex interactions between the batteries themselves.
3Adaptability or versatility
If a dual battery system with switching elements is implemented, then the adaptability to battery abnormalities improves, but the device complexity increases
Solution Approach 1:
The controller performs multiple functions: it monitors battery status, detects abnormalities, manages power switching, and controls ignition timing. By making the controller multi-functional, the system achieves high adaptability to battery abnormalities without adding separate dedicated components for each function, thereby limiting the increase in overall device complexity.
Solution Approach 2:
The system uses its own existing controller to manage the power switching between batteries, rather than requiring an external or separate power management unit. The controller leverages its existing monitoring and control capabilities to handle battery switching, allowing the system to adapt to abnormalities while minimizing additional complexity through self-service functionality.
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
This solution allows for stable power supply to the ignition coil, preventing catalytic converter degradation and ensuring vehicle stability by switching to the low voltage battery when the high voltage battery is abnormal, maintaining engine operation.
Implementation Method 1
a primary coil and a secondary coil, wherein one end of the primary coil is selectively electrically connected to the high voltage battery and the low voltage battery
Implementation Method 2
a diode provided between the low voltage battery and the primary coil of the ignition coil
Data Source
AI summary
An embodiment system includes an ignition coil including a primary coil and a secondary coil, a high voltage battery selectively electrically connected the primary coil, a low voltage battery selectively electrically connected to the primary coil, and an electric and electronic element provided between the high voltage battery, the low voltage battery, and the primary coil of the ignition coil to selectively supply electric power of the high voltage battery or the low voltage battery to the primary coil.