How to Measure Battery Internal Resistance Using the Current Interrupt Method

James Niemann, Analog Design Engineer, Tektronix

One of the demonstrations we often set up at battery conferences is to use a source measure unit (SMU) to measure the internal resistance of an energy storage device such as a battery or a fuel cell. In such demonstrations, the SMU changes the load current from the battery operating current or the polarizing current to the open circuit potential and simultaneously measures the change in cell voltage. In this “current interrupt method,” the battery’s internal resistance is equal to the change in voltage divided by the change in current. Read more about How to Measure Battery Internal Resistance Using the Current Interrupt Method

How to Measure Battery Internal Resistance Using the Current Interrupt Method

James Niemann, Analog Design Engineer, Tektronix

One of the demonstrations we often set up at battery conferences is to use a source measure unit (SMU) to measure the internal resistance of an energy storage device such as a battery or a fuel cell. In such demonstrations, the SMU changes the load current from the battery operating current or the polarizing current to the open circuit potential and simultaneously measures the change in cell voltage. In this “current interrupt method,” the battery’s internal resistance is equal to the change in voltage divided by the change in current. Read more about How to Measure Battery Internal Resistance Using the Current Interrupt Method

How to Use an SMU Instrument in Charge/Discharge Cycling for Battery Characterization

Mary Anne Tupta
Keithley Instruments, a Tektronix Company

Rechargeable batteries power a rapidly expanding range of electronic devices, from laptops and tablets to mobile phones and wearable health-monitoring devices. When purchasing these devices, consumers typically take a hard look at battery life and recharge times; operating time is often a deciding factor in the purchase of a mobile device. As a result, researchers are studying ways to increase battery life and decrease the cost of rechargeable batteries. Read more about How to Use an SMU Instrument in Charge/Discharge Cycling for Battery Characterization

Li-Ion Battery Technology Delivers High Power for Data Center UPS Installations

Stuart Lansburg and Christophe Jehoulet
Saft

The changing needs of data center developers and operators, combined with the explosion in cloud computing, are driving the demand for high density storage and secure online operations. There are more than half a million data centers in existence today. All together, they suffer 2.8 million hours of downtime each year at a cost of $426 billion. Read more about Li-Ion Battery Technology Delivers High Power for Data Center UPS Installations