Thermoelectric Fluid Meter Power Supply for Long-Life Remote Operation

The patent combines a thermoelectric generator with a rechargeable battery system to create a hybrid power supply. The thermoelectric generator converts temperature differences between the fluid and ambient air into electrical energy, which charges the battery. This merging allows the system to achieve on-site recharging without requiring a large battery capacity, as the battery is supplemented by continuous energy harvesting from the temperature differential.

The thermoelectric generator enables the battery to recharge itself automatically by exploiting the natural temperature difference between the flowing fluid and the ambient air. This self-charging mechanism eliminates the need for external charging infrastructure or large capacity batteries, thereby reducing overall system cost while maintaining on-site recharging capability.

The patent changes the energy supply parameters by introducing a continuous energy harvesting mechanism (thermoelectric generator) that converts thermal energy from the temperature difference into electrical energy. This allows the system to maintain extended power supply duration without increasing battery size, as the battery is continuously topped up by the thermoelectric generator rather than relying solely on initial charge capacity.

The thermoelectric generator provides continuous energy harvesting as long as there is fluid flow and a temperature difference exists, regardless of whether the flow is continuous or intermittent. This continuous energy input smooths out the charge-discharge cycles of the battery, preventing deep discharge states and reducing stress on the battery, thereby maintaining battery performance and reliability under variable flow conditions.