Battery-Powered Vacuum Pump Control Using Pack Impedance
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Solution Overview
Problem
Conventional vacuum pumps lack efficient battery management systems to optimize battery pack usage in portable devices, leading to suboptimal performance and runtime in applications like air conditioning and refrigeration systems.
Innovation Solution
A battery pack powered vacuum pump system with integrated sensing circuits and a controller that determines battery pack impedance and type, setting a voltage threshold to manage energy discharge and control the vacuum pump's operation for extended runtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional vacuum pumps operate without integrated battery management systems, then device complexity is reduced, but runtime and performance optimization deteriorate
Solution Approach 1:
The battery management system continuously monitors battery pack voltage and current, providing feedback to the controller. The controller adjusts pump operation based on real-time battery impedance measurements and state of charge calculations, optimizing runtime through closed-loop control
Solution Approach 2:
The system automatically determines battery pack type through impedance sensing and performs self-optimization of operating parameters without user intervention. The controller autonomously manages energy discharge rates and operational modes based on battery state
2Productivity
If the vacuum pump operates at high power consumption, then productivity is improved, but battery energy depletes faster
Solution Approach 1:
The system dynamically adjusts pump power consumption based on real-time battery state. The controller modulates motor speed and pump operation intensity according to available battery energy and impedance characteristics, optimizing the balance between productivity and energy conservation
Solution Approach 2:
The controller changes operational parameters such as motor speed, pump flow rate, and power consumption levels based on detected battery pack type and state of charge. Different operating modes are selected to maximize productivity within energy constraints
Data Source
AI summary
A battery pack powered device includes a housing including a battery pack interface configured to receive a battery pack, a first sensing circuit configured to detect a battery pack voltage of the battery pack, a second sensing circuit configured to detect a current from the battery pack, and a controller. The controller includes a processor and a memory. The controller is configured to receive a first signal from the first sensing circuit related to the battery pack voltage, receive a second signal from the second sensing circuit related to the current from the battery pack, determine a battery pack impedance based on the battery pack voltage and the current from the battery pack, determine a battery pack type of the battery pack based on the battery pack impedance, and set a voltage threshold for the battery pack based on the battery pack type.