Supplementary Power Supply Circuit for Vehicle Battery Control
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Solution Overview
Problem
The existing car power source apparatus is vulnerable to auxiliary battery voltage drops, which can lead to unstable or inoperable control circuit operation, causing battery-switches to fail in maintaining the ON state and disrupting power supply to the vehicle's motor.
Innovation Solution
A car power source apparatus with a supplementary power supply circuit that draws operating power from a segment of the driving battery to maintain control circuit operation, even during auxiliary battery voltage drops, using series-connected batteries to set the optimal voltage for the control circuit, thereby ensuring continuous control of battery-switches without the need for a dedicated power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the auxiliary battery supplies operating power to the control circuit, then the control circuit can operate during normal conditions, but the control circuit becomes unstable or inoperable when the auxiliary battery voltage drops due to high current discharge
Solution Approach 1:
A supplementary power supply circuit is introduced as an intermediary between the driving battery and the control circuit. This mediator detects voltage drops in the auxiliary battery and automatically supplies operating power from the driving battery to the control circuit when needed, preventing control circuit instability without requiring permanent direct connection
Solution Approach 2:
The driving battery is designed to serve multiple functions: it acts as the primary power source for the motor during vehicle operation and simultaneously serves as a backup power source for the control circuit when the auxiliary battery voltage drops. This multi-functionality eliminates the need for a dedicated backup power supply
2Reliability
If a dedicated power supply is installed to maintain control circuit operation during voltage drops, then control circuit reliability improves, but the device complexity and cost increase
Solution Approach 1:
The power supply functions are merged into a single integrated system. The driving battery, supplementary power supply circuit, and control circuit form a unified power management system where the driving battery serves both motor propulsion and control circuit power needs, eliminating the requirement for separate dedicated backup power supplies and reducing overall system complexity
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
The solution ensures consistent control circuit operation and proper battery-switch management, preventing power disruptions to the vehicle's motor, even under high load conditions, and eliminates the requirement for a dedicated power supply during voltage drops, ensuring reliable power delivery.
Implementation Method 1
a supplementary power supply circuit (6) that supplies operating power to the control circuit (4) power supply line (5) from a segment of batteries (10) that make up the driving battery (1)
Data Source
AI summary
The car power source apparatus is provided with a driving battery having a plurality of connected batteries, battery-switches that connect the driving battery to the vehicle-side load, a control circuit that controls the battery-switches, and an auxiliary battery that supplies operating power to the control circuit power supply line. The power source apparatus is provided with a supplementary power supply circuit that supplies operating power to the control circuit power supply line from batteries in the driving battery to maintain control circuit operation in the event of an auxiliary battery voltage drop condition. In an auxiliary battery voltage drop condition, the supplementary power supply circuit supplies operating power to the control circuit power supply line and maintains control circuit operation to maintain control of the battery-switches.