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Wearable device is a generic term for devices that can be worn on the body. They are typically equipped with sensors and applications that monitor an individual’s health parameters and physical activity. For example, smartwatches can record exercise and sleep data by measuring heart rate, the number of steps, and calories burned. Smart glasses can display various information and provide navigation services. As tools that help users manage their health and improve quality of life, wearable devices have emerged as an essential daily technology for many people.
Due to the need for longevity and power output, the conventional batteries (power sources) used in wearable devices tended to be bulky, which in turn made them large and uncomfortable to wear.
Integrating thin, compact EnerCera lithium-ion rechargeable batteries with wearable devices provides the following benefits:
One example of a wearable device used for athletic training are the smart insoles placed inside shoes, which measure the contact pressures generated within the insole to measure balance and load transfer during exercise. This data can then be analyzed by a coach or trainer to provide guidance and suggest changes for more effective movement to improve athletic performance.
The high-capacity, thin, compact, lightweight EnerCera lithium-ion rechargeable battery provides the following advantages for smart insoles:
One example of a wearable device in the medical field is the continuous glucose monitoring (CGM), which measures blood glucose levels. This device performs sustained measurement of blood glucose level using a sensor attached to the skin, which measures the concentration of glucose in the subcutaneous interstitial fluid, to aid self-management of condition for diabetics.
Adopting the thin, compact, lightweight, EnerCera lithium-ion rechargeable battery to power this sensor offers the following benefits:
The EnerCera battery is an ultra-thin and ultra-small Li-ion rechargeable battery. A semi-solid-state battery developed using NGK’s original crystal oriented ceramic plate as electrodes, EnerCera achieves features that were difficult to incorporate together in existing Li-ion rechargeable batteries, such as high capacity, high output, high heat resistance, and long lifetime.
Due to its low internal resistance, EnerCera batteries can store incredibly small amounts of electricity and output large amounts of power when required, making them the ideal power source for energy harvesting and wireless power transfer (WPT). These technologies can be combined with EnerCera to create power supply systems for maintenance-free IoT devices that rely only on natural energy sources and which can be used repeatedly.
EnerCera can function as an energy storage device that offers the advantages of both a capacitor and a Li-ion rechargeable battery, thereby contributing to the implementation of self-sustaining IoT systems in society.
Below are some example applications powered by EnerCera.
The Challenge of Building State-of-the-Art Smart Running Shoes
The Challenge of building a wearable bed-exit sensor
Unobtrusive Smart Patch Revolutionizes Monitoring and Diagnosis
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