Hybrid Battery Pack Assembly with Demand-Based Cell Switching
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Solution Overview
Problem
Battery pack assemblies face challenges in meeting the increasing power demands of modern electronic loads, particularly in providing sustained power and high current pulses over extended periods while maintaining a compact size, as traditional capacitors struggle to supply power for durations exceeding their capacity.
Innovation Solution
A hybrid battery pack assembly with dedicated battery cells for low and high demand periods, utilizing a switch to manage current distribution based on demand thresholds, ensuring efficient power delivery by switching between cells to optimize performance and extend run times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional capacitors are used to supply high current pulses, then power delivery capability is improved, but duration of power supply deteriorates
Solution Approach 1:
The battery pack is segmented into multiple battery cells (first battery cell, second battery cell, etc.) that can be independently controlled. Each cell can be switched on or off based on demand, allowing the system to deliver high power when needed while extending overall duration by managing individual cell discharge cycles.
2Duration of action of moving object
If battery pack size is increased to extend run time, then duration of action is improved, but volume of the object deteriorates
Solution Approach 1:
The battery pack employs dynamic switching between different battery cells based on real-time power demand. The controller activates specific cells during high-demand periods and switches to other cells or reduces activation during low-demand periods, optimizing the use of available battery capacity within the fixed volume to extend effective run time.
3Adaptability or versatility
If multiple battery cells are used to meet varying power demands, then adaptability is improved, but device complexity deteriorates
Solution Approach 1:
The controller continuously monitors power demand from the electronic load and provides feedback control by switching individual battery cells on or off based on threshold criteria. This feedback mechanism enables the system to adapt to varying power demands while maintaining relatively simple control logic that activates or deactivates cells based on predefined thresholds.
4Productivity
If battery cells are switched based on demand thresholds, then productivity is improved, but device complexity deteriorates
Solution Approach 1:
The controller is pre-programmed with threshold criteria for switching between battery cells. Instead of using complex real-time optimization algorithms, the system employs predetermined switching thresholds that simplify the control logic while still enabling efficient power delivery by activating cells before they are fully depleted and switching between cells in advance of complete discharge.
Data Source
AI summary
A battery pack assembly includes a first battery cell supplying electric current to an electronic load, a second battery cell supplying electric current to the electronic load, and a first switch operatively coupled with the first battery cell and the electronic load. The first switch stops conduction of the electric current to the electronic load responsive to an increase in electric demand of the electronic load above a designated threshold. A method of powering an electronic load using a battery pack assembly also is provided.