High Drain & Extended Temperature Lithium Coin Batteries Development for IoT Devices

Murata Manufacturing Co., Ltd. (Head Office: Nagaokakyo-shi, Kyoto; President: Norio Nakajima) announces development of new High Drain and Extended Temperature batteries as part of its lithium coin battery line-up. These products are now in mass-production, samples are available upon request.

1. Development Background

Application of lithium coin batteries is widespread, ranging from the Internet of Things (IoT), automotive, medical to factory automation (FA) markets. Traditionally, lithium coin batteries have been used to provide backup power for low drain devices. However, the demand for lithium coin batteries as the main power source are recently drastically increasing with growing the IoT market. In order to support such customer needs, in addition to current standard and heat resistant lithium coin batteries, Murata has newly developed High Drain and Extended Temperature lithium coin batteries by leveraging its heat resistant battery engineering design and utilization technologies that have accumulated over the past many years of production.

The High Drain lithium coin batteries are ideal for tracking devices for logistics and asset management by adopting Low Power Wide Area (LPWA) networks such as Semtech’s LoRa Technology and SIGFOX as well as for outdoor infrastructures, FA control systems and environment monitoring sensors. The Extended Temperature lithium coin batteries are designed mainly for automotive devices and outdoor IoT systems (including smart meters and FA control systems) and can also be used as an alternative smaller and thinner solution to conventional lithium cylindrical batteries.

Murata’s Lithium Coin Battery Specification

Body Image 1-Murata High-Drain Extended Temperature Lithium Coin Batteries-updated

Body Image 1a-Murata High-Drain Extended Temperature Lithium Coin Batteries

Body Image 2-Murata High-Drain Extended Temperature Lithium Coin Batteries

2-1. Characteristics of High Drain lithium coin batteries

Body Image 3-Murata High-Drain Extended Temperature Lithium Coin Batteries

  • • Double the maximum pulse discharge current of standard lithium coin batteries (50mA)*1
  • • Can also be used for LPWA communication devices including LoRA, which has been difficult by standard lithium coin batteries due to its high peak current requirements*2
  • • Triple the discharge time*3 compared to standard lithium batteries, enabling longer battery life and less battery replacement requirements

*1 Maximum current of pulsed discharge (3 seconds) at 2V or higher discharged with 50% nominal capacity at an ambient temperature of 23ºC
*2 Peak current may vary according to the using environment and conditions of use
*3 Pulsed discharge at 45mA for 3 seconds and no discharge for 33 seconds at an ambient temperature of 23ºC

Mr. Vivek Mohan, Director of IoT, of Semtech Corporation, a member of LoRa Alliance and a joint developer of LoRaWAN modules with Murata, comments as follows:

"Semtech's LoRa RFIC SX1261 requires approx. 25mA power supply current at 3V supply voltage and 42mA at 1.8V to generate typical LPWA output at 20mW. The LoRaWAN standard defines the maximum transmit time at 3 seconds. Murata’s new High Drain lithium coin batteries will support, up to 50mA and 3 seconds of current, making it a promising solution for LoRaWAN-compatible small sensor nodes."

2-2. Characteristics of Extended Temperature lithium coin batteries

Body Image 4-Murata High-Drain Extended Temperature Lithium Coin Batteries

  • • The compatible operating temperature for electronic parts and ICs*4 ranges between -40ºC and 85ºC
  • • The voltage drop is minimal compared to the standard lithium coin batteries even when stored for over 100 days at 85ºC
  • • More affordable than the heat resistant lithium coin batteries, providing better price-performance
  • • CR3677X, the largest capacity Extended Temperature*5 lithium coin battery, delivers the largest capacity in lithium coin battery form factor*6, thereby enabling smaller and thinner device design flexibility

*4 The operating temperature range of standard lithium coin batteries is −30ºC to 70ºC
*5 Shipment of mass-produced CR3677X is scheduled to start at the end of 2019
*6 Murata Research, September 28, 2018

 

New Product Lineup

 Type  Model  number  Nominal   voltage    Operating  temperature   Nominal  capacity*   Recommended   continuous  discharge  current  Maximum   pulse  discharge   current**  Diameter   Height   Weight 

 High Drain

 CR2032R
 3.0V
 -30 to 70ºC
 200mAh  ≦3mA  50mA  20.0mm  3.2mm  3.0g

 High Drain

 CR2450R  3.0V  -30 to 70ºC  500mAh  ≦3mA  50mA  24.5mm  5.0mm  6.2g

 Extended  Temperature 

 CR2032X  3.0V  -40 to 85ºC  220mAh  ≦1mA  30mA  20.0mm  3.2mm  3.0g

 Extended  Temperature

 CR2450X   3.0V  -40 to 85ºC  600mAh  ≦1mA  30mA  24.5mm  5.0mm  6.2g

 Extended  Temperature 

 CR2477X   3.0V  -40 to 85ºC  1000mAh  ≦1mA  30mA  24.5mm  7.7mm  9.5g

 Extended  Temperature 

 CR3677X   3.0V  -40 to 85ºC  2000mAh  ≦1mA  80mA  36.5mm  7.7mm  20g

* Capacity when discharged at standard discharge current (temperature: 23ºC, end of discharge voltage: 2.0V)
** Current for maintaining minimum 2V voltage with pulsed discharge of 3 seconds and 50% nominal capacity discharged (ambient temperature 23ºC)
Data is for reference purpose only

Murata is committed to providing a one-stop electronic component and solution for the IoT market. In September 2017, Murata added Sony’s battery business operations, bringing in Sony’s 40 years of battery manufacturing experience and expertise, into its product offerings in an effort to better serve customers’ growing and diversified needs. Murata will continue to contribute to the growth of IoT market.

 

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