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The present research examines the mechanical design of a biocompatible low-frequency energy harvester for leadless pacemakers to resolve the problem of limited battery life. The harvester design comprises five piezoelectric cantilevers organized in parallel with separate individual masses and a single common mass, constructed with silicone substrate and PVDF as active material containing the dimensions 4 × 19.08 × 0.50 mm. This configuration can generate the required power to operate a typical pacemaker. The simulations were conducted using COMSOL Multiphysics 5.5 for the secondary frequency of heart vibration of 20–30 Hz. The proposed energy harvester with mono-mass creates a maximum power output of 52.1 µW with 0.5 Hz bandwidth, while separate-mass configuration demonstrated a power output of 43.2 µW with 1 Hz bandwidth representing an improvement of nearly 20% compared to the total power provided by the individual mass designs with the exact dimensions.

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Design and Simulation of a Biocompatible Low-Frequency Vibrational Energy Harvester with Optimized Parallel Cantilever Array

  • 会议论文

  • 发表日期：

    2025年

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  • Pushplata Tiwari,
  • Mamta Devi,
  • Anurekha Sharma,
  • Sunny,
  • Surya Prakash

摘要

The present research examines the mechanical design of a biocompatible low-frequency energy harvester for leadless pacemakers to resolve the problem of limited battery life. The harvester design comprises five piezoelectric cantilevers organized in parallel with separate individual masses and a single common mass, constructed with silicone substrate and PVDF as active material containing the dimensions 4 × 19.08 × 0.50 mm. This configuration can generate the required power to operate a typical pacemaker. The simulations were conducted using COMSOL Multiphysics 5.5 for the secondary frequency of heart vibration of 20–30 Hz. The proposed energy harvester with mono-mass creates a maximum power output of 52.1 µW with 0.5 Hz bandwidth, while separate-mass configuration demonstrated a power output of 43.2 µW with 1 Hz bandwidth representing an improvement of nearly 20% compared to the total power provided by the individual mass designs with the exact dimensions.