Murata announces UMAC small energy device

Murata has developed the UMAC, a small, large-capacity cylinder-type energy device. This product is being introduced to the Americas at CES 2016.

Background

In recent years there is growing demand for compactness, large capacity, extended cycle life (to eliminate the need for replacement), low internal resistance, fast charging and discharging, and ability to withstand load fluctuations in energy devices used in wearable devices and sensor nodes for wireless sensor networks, both product categories that are expected to achieve widespread popularity moving forward. With this in mind, Murata has developed the UMAC, a small, large-capacity energy device. The UMAC can be used as a small secondary battery in the same manner as a capacitor, but it achieves high-rate charge/discharge characteristics and extended cycle life superior to conventional secondary batteries. As a power supply for wearable devices or sensor nodes for wireless sensor networks, the UMAC maintains flat voltage characteristics while accommodating a wide range of load characteristics.

Constant current discharge characteristic.

Features

1. High-rate charge/discharge:
   Max. charge/discharge rate (current): 10C (30 mA)
    
2. High safety:
   The highly safe design: Because of its small capacity and the use of chemically stable materials, thermal runaway does not occur.
    
3. Extended cycle life:
   Charge (capacity) recovery rate of 90% or higher after 1,000 cycles

Charge-discharge cycle characteristic.

Applications

• Energy device for sensor nodes of wireless sensor networks
  • High-rate discharge characteristics mean that peak-assist capacitors are not required.
  • Low self-discharge level minimizes loss of stored energy.
  • Flat voltage characteristics permit use immediately after charging starts for stable device operation.
     
• Power supply for digital pens or wearable devices
  • High-rate charge characteristics and long cycle-life characteristics enable repeated use after rapid charging.
  • Chemically stable composition allows small size and safe packaging. (Smoke or fire will not be generated even if the terminals are shorted.)
     
• Backup power supply for electric home appliances and electronic devices such as mobile phones and information terminals
  • High-rate discharge characteristics allow for use in a variety of backup scenarios over a wide output range.

Electric characteristics