HarvestLoop™

This is an energy harvesting module to replace the CR2032 coin battery. Integrating a battery, photovoltaic (PV) cell, communication circuit, and various types of sensors into a single unit, it has a compact design that fits into existing coin battery cases. It eliminates the need for battery replacement in small devices through its self-contained power supply using a PV cell. It can quickly meet requirements such as removing the need for battery replacement while using an existing product design, or adding communication function to a device.

Usage

It can replace coin batteries being used in various applications. It eliminates the effort and burden of battery replacement.

*

The battery case needs to be made transparent.

Remote controls

Sensors

Measuring instruments

Bicycle Components

Features

As it is compatible with CR2032, it allows energy harvesting technology to be introduced without significant changes to the existing product design or infrastructure. The use of energy harvesting technology achieves both maintenance-free operation—in terms of battery replacement—and lower environmental impact. Functions can be added flexibly as it comes with Bluetooth.

CR2032-Compatible Coin Battery Module
Charging by solar power generation
Equipped with Bluetooth^® Low Energy 5.3 communication function
Integrated PV cell
Replaceable PV cell (single- or multi-cell)
Internal sensors (acceleration, temperature and humidity, and magnetic)
Supports wireless power transfer over the air (requires separate external antenna)
Supports SMT

Specifications

General

Size	φ20mm x 3.2mm (Compatible w/ CR2032)
Weight	TBD
Battery Capacity (ET1210C-H)	4mAh
Output Voltage	3.0V ±2%
Discharge Current (Max)	15mA
Operating Temperature Range	-20 to 60℃

Energy Harvesting

PV Cell	φ16mm (Active Area), 4 Cells
Solar Harvest Current [Vop 2.5V]	5uA @200Lux, 100uA @5000Lux
RF Harvest Frequency^*	400MHz to 2500MHz
RF Harvest Input @918MHz^*	-18 to 10 dBm
RF Harvest Input @2450MHz^*	-15 to 10 dBm

*

RF harvest requires an external antenna.

Sensors

3-axis Acceleration Sensor	16bit Digital Acceleration Ranges:±2g/4g/8g/16g
Humidity & Temp. Sensor	Relative Humidity Range : 0 to 100% Humidity Accuracy : ±2% Temperature Range : -40 to 85℃ Temperature Accuracy : ±0.2℃
Hall Effect Sensor	Magnetic Threshold:9.5mT, Omni-polar

3-axis Acceleration Sensor

16bit Digital
Acceleration Ranges:±2g/4g/8g/16g

Humidity & Temp. Sensor

Relative Humidity Range : 0 to 100%

Humidity Accuracy : ±2%

Temperature Range : -40 to 85℃

Temperature Accuracy : ±0.2℃

Hall Effect Sensor

Magnetic Threshold:9.5mT, Omni-polar

Wireless Communication

Bluetooth^® Low Energy 5.3	Tx @0dBm: 3.0mA Rx @-95dBm: 1.4mA
Range	Approx. 10m

MCU

64MHz ARM Cortex M33F
64KB ROM, 128KB RAM, 512KB NVM

*

Please understand that product specifications may change without prior notice.

System configuration

This is an all-in-one IoT module that integrates a secondary battery, PV cell, Bluetooth^® Low Energy communication circuit, and various types of sensors into a single unit. It also supports the option of wireless power transfer (WPT) via an external antenna to provide full performance even in places where light does not reach.