Daisy-Chained Blood Pump Batteries for Modular Redundant Power
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Solution Overview
Problem
Existing ventricular assist devices (VADs) face challenges with power supply modularity and redundancy, leading to heavy and inflexible battery packs that limit patient mobility and activity based on battery capacity needs.
Innovation Solution
A modular energy supply system is introduced, where multiple energy storage devices are mechanically coupled in series and electrically coupled in parallel, allowing for additional modules to be connected, providing redundant power sources and increased flexibility in meeting power capacity needs without unnecessary weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single large capacity battery pack is used to meet power needs, then power capacity is sufficient, but weight increases and patient mobility is limited
Solution Approach 1:
The battery system is divided into multiple separate battery modules (first battery module, second battery module, third battery module) that can be independently carried and connected. Each module provides a portion of the total power capacity, allowing patients to carry only the number of modules needed for their specific activity duration requirements, thereby reducing unnecessary weight while maintaining sufficient power capacity.
Solution Approach 2:
The battery configuration is made dynamic and adaptable through the ability to connect and disconnect battery modules as needed. The system transitions from a fixed single-battery design to a flexible multi-module configuration that can be adjusted based on real-time power needs, enabling patients to optimize the balance between weight and power capacity for each activity.
2Duration of action of moving object
If multiple battery packs are carried to extend power capacity, then power duration increases, but weight and device complexity increase
Solution Approach 1:
Each battery module is designed with universal connectivity features - both a power output interface and a power input interface - allowing any module to function either as a power source or as an extendable battery. This multi-functionality simplifies the overall system design and reduces complexity by using standardized interfaces across all modules, eliminating the need for different types of battery packs.
Solution Approach 2:
Multiple battery modules are merged into a single functional power system through electrical connection. When connected, the modules work together as an integrated power source, combining their capacities to extend duration. The merging process is simplified by using matching interfaces that allow straightforward connection without complex configuration.
3Reliability
If redundant battery capacity is provided for safety, then power reliability improves, but weight increases
Solution Approach 1:
Redundancy is achieved through segmentation rather than over-provisioning a single battery. The system divides power capacity into discrete modular units, where redundancy can be selectively added by carrying an additional module. This allows patients to carry exactly the right amount of redundant capacity needed for safety without the excess weight of a continuously oversized single battery pack.
Data Source
AI summary
A mechanical circulatory support system includes an implantable blood pump and a system controller configured to control operation of the implantable blood pump. The system controller includes a system controller rechargeable energy storage device, a system controller input connector, a system controller output connector, and a system controller display. The system controller output connector is configured for operatively coupling the system controller to the implantable blood pump. The system controller is configured to display a system controller charge level indicator on the system controller display indicative of a charge level of the system controller rechargeable energy storage device. The system controller input connector is configured for operatively coupling the system controller with a power source configured to supply electrical power to the system controller for use in recharging the system controller rechargeable energy storage device and powering operation of the implantable blood pump.