Vehicle Power Management with Backup Battery Load Switching
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Solution Overview
Problem
When a vehicle engine is turned off, the vehicle power supply is interrupted, causing in-vehicle load devices to lose power, and the depletion of the vehicle's power supply can lead to insufficient power for engine re-starting due to increased load demands.
Innovation Solution
A vehicle power management system comprising a control circuit, a charge/discharge circuit, and a backup battery that monitors the vehicle power supply's output voltage to determine engine status, supplying power from the vehicle power supply to the backup battery and load devices when the engine is started, and using the backup battery to power load devices when the engine is off, thereby preventing power supply depletion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the vehicle engine is turned off to prevent air pollution, then exhaust emission is reduced, but the vehicle power supply stops powering in-vehicle load devices
Solution Approach 1:
The patent introduces a backup battery as an intermediary power source between the vehicle power supply and load devices. When the engine is off, the backup battery mediates the power supply to load devices, preventing direct depletion of the vehicle power supply while enabling continued operation of essential devices.
Solution Approach 2:
The backup battery is pre-charged during engine operation before the engine is turned off. This preliminary charging action ensures that when the engine stops and the vehicle power supply is interrupted, the load devices can immediately switch to backup battery power without interruption.
2Adaptability or versatility
If the number of in-vehicle load devices is increased to improve functionality, then vehicle features are enhanced, but the power stored in the vehicle power supply is quickly depleted
Solution Approach 1:
The patent segments the power supply system into two independent parts: the vehicle power supply for engine starting and the backup battery for load device operation. This segmentation allows multiple load devices to operate simultaneously without affecting the vehicle power supply's ability to start the engine, as each power source serves its dedicated function.
3Reliability
If power is supplied to both in-vehicle load devices and backup battery from the vehicle power supply, then all devices can operate, but the vehicle power supply becomes insufficient for engine starting
Solution Approach 1:
The patent implements a dynamic power management system where the charge/discharge circuit automatically switches between charging the backup battery from the vehicle power supply and discharging the backup battery to power load devices. This dynamic adjustment ensures the vehicle power supply maintains sufficient power for engine starting while still supporting load device operation through the backup battery.
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
Enables continuous use of in-vehicle load devices when the engine is off, without depleting the vehicle power supply, ensuring reliable engine re-starting by using the backup battery to power these devices.
Implementation Method 1
a backup battery (3). The control circuit (1) is electrically connected to the vehicle power supply P and the vehicle load device L, and monitors an output voltage of the vehicle power supply P
Implementation Method 2
The charge/discharge circuit (2) is electrically connected to the control circuit (1), the backup battery (3) and the vehicle load device L
Data Source
AI summary
A vehicle power management system and an operating method thereof are provided. The vehicle power management system is adapted for a vehicle load device and a vehicle power supply, and includes a control circuit, a charge/discharge circuit and a backup battery. The control circuit is electrically connected to the vehicle power supply and the vehicle load device, and monitors an output voltage of the vehicle power supply and determines according to the output voltage whether a vehicle engine is started. The charge/discharge circuit is electrically connected to the control circuit and the backup battery. When the vehicle engine is started, the charge/discharge circuit supplies power of the vehicle power supply to the backup battery and the vehicle load device. When the vehicle engine is not started, the backup battery discharges the charge/discharge circuit and the charge/discharge circuit supplies power of the backup battery to the vehicle load device.