Alternating Power Supply for Vehicle Accessories
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Solution Overview
Problem
The existing method of powering electrical accessories in motor vehicles after battery charging solely relies on the vehicle's battery, leading to partial discharge of the freshly recharged battery, which reduces the vehicle's range for its next use.
Innovation Solution
A method that alternates between powering accessories using the vehicle battery and an external electric generator, with the battery being discharged during one phase and recharged during the other, while setting threshold values to prevent undervoltage and overvoltage, thereby limiting the reduction in vehicle autonomy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the accessory is powered solely by the vehicle battery after charging, then the accessory can be powered continuously, but the battery charge is partially discharged which reduces the vehicle range
Solution Approach 1:
The patent applies periodic action by alternating between two power supply modes: using the vehicle battery to power the accessory during periods when it benefits the vehicle, and switching to external electric generator power during periods when the battery needs to be preserved. This periodic switching resolves the contradiction by ensuring the accessory receives continuous power while the battery charge is maintained through regular recharging cycles, thus preserving vehicle range.
2Ease of operation
If the battery is discharged to power the accessory, then the accessory operation is ensured, but the vehicle autonomy is reduced
Solution Approach 1:
The patent introduces an intermediary control system that manages power distribution between the battery, accessory, and external generator. This intermediary controller monitors battery charge levels and automatically switches power sources, allowing the accessory to operate continuously while preventing excessive battery discharge that would reduce vehicle autonomy. The controller acts as a mediator to balance accessory operation needs with vehicle range preservation.
3Quantity of substance
If the battery is recharged while powering the accessory from the external generator, then the battery charge is maintained, but the risk of overcharging or overvoltage increases
Solution Approach 1:
The patent implements feedback control by continuously monitoring battery charge characteristics (such as voltage and charge level) and using this information to regulate the charging process from the external generator. When the battery reaches appropriate charge levels or when voltage thresholds are approached, the control system automatically adjusts or terminates charging, preventing overcharging and overvoltage conditions. This feedback mechanism ensures battery charge is maintained while preserving voltage stability and reliability.
Data Source
Figure 1~3b
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AI summary
The invention relates to a method for powering an electrical accessory (50) of a motor vehicle comprising an electric battery (10) to which said accessory is connected, said accessory and said battery also being electrically connected to an external electric generator (20), whereby the following steps are performed in alternation: a) said accessory is powered by the vehicle battery and b) said accessory and said battery are powered by the external electric generator. The invention also relates to a motor vehicle comprising an electrical accessory connected to an electric battery of said vehicle, in which the supply of power to said accessory is controlled by this method when the battery is charged and connected to an external generator. Figure 2