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Convert vibrations into electricity: a French invention for autonomous recharging

Le Comptoir Éolien presents an invention that converts mechanical vibrations into electricity for battery recharging. The system combines a low-power motor, permanent magnet, and coil, with (optionally) a rectifier bridge for DC storage. It targets situations where only low vibrational sources (devices, structures, micro-movements) are available, and where auxiliary autonomy is crucial.

Key takeaways

  • Harness low vibrations: when sun and wind are unavailable or irregular, this system recovers often lost energy.
  • Emergency recharge of flat batteries.
  • Compact & portable format: designed for autonomy in nomadic or isolated contexts (portable devices, sensors/IoT, sites without available energy).
Diagram: vibrations → electricity (FR2503440) — motor, magnet, coil, and rectifier bridge for battery charging

How does it work?

  1. The motor generates vibrations.
  2. These vibrations disturb the field of the permanent magnet.
  3. The coil experiences an induced voltage, according to the principle of electromagnetic induction.
  4. An (optional) rectifier bridge converts this current into direct current to recharge a battery.

Important: the device does not create energy; it recovers and converts an existing mechanical energy (vibrations) into electricity, with the aim of reducing losses.

Prototype under test: conversion of micro-vibrations into direct current measured with a multimeter, invention FR2503440

What is it used for concretely?

  • Nomadic/field: emergency recharge of light tools or low-power accessories.
  • IoT & sensors: powering sensors located on vibrating structures (machines, gateways, urban equipment).
  • Isolated sites: complement to other micro-energy sources when nothing else is available.

Usage advice & best practices

  • Sizing: adapt the chemistry and charge management (voltage/current) to the target battery. The document shows an example in 6 V/4 Ah; other configurations require suitable electronics.
  • Safety: use protections (diodes, fuses, charge controller) and respect the charging ranges of the battery manufacturer. The figures published in the document are related to a prototype; standardized tests are still necessary before communicating guaranteed performance.

Contacts

About the invention

System for recovering and converting vibrational energy into electricity for battery recharging — autonomous device combining motor, magnet, and coil, designed to convert vibrations into usable electricity for recharging. Applications: portable devices, sensors, isolated environments.

Mentions & caution

  • INPI References: FR2503440 — filed on 04/02/2025; authorization for disclosure/exploitation on 06/06/2025.
  • The device is at the prototype stage; any performance must be validated by standardized and independent tests before any communication of guaranteed figures.

Frequently Asked Questions

What is the invention FR2503440?
A device that converts mechanical vibrations into electricity to recharge batteries, via a motor, a permanent magnet, a coil, and, if necessary, a rectifier bridge.
Does the invention produce energy?
No. It recovers existing energy (vibrations) and converts it into usable electricity.
What sources of vibrations can be exploited?
Machines, structures (bridges, walkways), urban equipment, engines, household appliances, vehicles... including low vibrations.
What is its practical use?
Mobile backup charging, powering sensors/IoT on vibrating structures, supplement in isolated sites when other sources are unavailable.
How does it work?
1) The motor generates vibrations; 2) the magnet's field is disturbed; 3) a voltage is induced in the coil; 4) an optional rectifier bridge provides direct current for charging.
What batteries can be recharged?
Rechargeable batteries compatible with the voltage and current delivered by the adapted charging electronics.
Is a rectifier bridge needed?
Yes, if one wishes to store in direct current (battery) or power a DC load.
What power can be expected?
It depends on the vibrational profile (amplitude, frequency, duration) and the design. The invention is at the prototype stage; performances will be confirmed by standardized tests.
What electrical protections should be planned?
Diodes, fuses, charge controller, and strict adherence to the battery manufacturer's charging ranges.
Can it be integrated into a solar/wind installation?
Yes, as a complement: each source contributes to the same storage via adapted regulations.
What is the status of the INPI protection?
Application FR2503440: filed on 04/02/2025; authorization to disclose/exploit on 06/06/2025; examination in progress.
Who to contact for tests, partnerships, or licenses?
Inventor: [email protected]
What regulatory requirements may apply?
Depending on the use (general public, sensors, industrial), standards and tests may apply and will be defined during industrialization.

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