Vehicle Battery Power Path Control Under High Current Load
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Solution Overview
Problem
Existing vehicle systems that use both a main battery and a sub-battery simultaneously lack safety measures, which can lead to reduced power performance and increased risk of ignition or smoke generation due to high current flows.
Innovation Solution
A vehicle system that includes a motor generator, a circuit, and a controller, which allows for electric power transfer between the motor generator and both the vehicle battery and an external trailer battery. The controller switches to a first mode when a load exceeds a predetermined threshold, restricting power transfer to prevent high current flows and potential ignition or smoke generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If both the main battery and sub-battery are used simultaneously to improve power performance, then the power output is increased, but the risk of ignition or smoke generation increases due to high current flows
Solution Approach 1:
The patent implements dynamic control of battery connection states based on real-time current load detection. The controller dynamically switches between different operational modes (first mode with both batteries connected, second mode with only main battery connected) according to whether the current exceeds the predetermined threshold, thereby adaptively managing power output and safety risks
2Reliability
If the controller restricts power transfer during high loads to prevent ignition or smoke generation, then safety is improved, but power performance is reduced
Solution Approach 1:
The controller dynamically adjusts the connection state of the sub-battery based on real-time current monitoring. When current exceeds the threshold, the system transitions to the second mode where only the main battery is connected, restricting power transfer to prevent harmful effects. When current is within safe limits, the system returns to the first mode allowing both batteries to contribute, thereby maintaining power performance
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 system improves power performance by allowing simultaneous use of both batteries and maintains safety by restricting power transfer during high loads, thereby reducing the risk of ignition or smoke generation.
Implementation Method 1
a motor generator 11, configured to receive and output electric power from and to the vehicle battery 13 and an external battery 22 disposed outside the vehicle
Data Source
AI summary
A vehicle includes a vehicle battery, a motor generator, a circuit, and a controller. The motor generator receives and outputs electric power from and to the vehicle battery and an external battery. The circuit couples the vehicle battery and the external battery to the motor generator. The controller controls the vehicle battery and the external battery, based on a first mode or a second mode. In the first mode, electric power is transferred between the motor generator and the vehicle battery and between the vehicle battery and the external battery, and not transferred between the motor generator and the external battery. In the second mode, electric power is transferred between the motor generator and the vehicle battery and between the motor generator and the external battery. The controller shifts to the first mode when a load applied to the circuit exceeds a predetermined load in the second mode.