While ac internal resistance (ACIR) measurements are quite common and somewhat standardized when measuring lithium-ion cells, dc internal resistance (DCIR) measurements are nonstandard and generally ...

A new computational method can measure the forces cells exert on each other by analyzing time-lapse videos of cell colonies. It could enable researchers to gain fundamental insights into what role ...

Electricity is a key aspect of life, and is required for organisms to move and communicate. The movement of tiny charged particles called ions across the membranes that enclose cells are what ...

MIT engineers have devised a new, noninvasive way to measure the stiffness of living cells using acoustic waves. Their technique allows them to monitor single cells over several generations and ...

Scientists at the Fraunhofer Institute for Solar Energy Systems ISE have cultivated a method for measuring the performance of back-contacted solar cells that avoids contact in the production line. The ...

Specifics on ac resistance and why ACIR has become a standard measurement for Li-ions. The 1-kHz test frequency for ACIR and why it's the benchmark frequency. Comparing ACIR test vs. electrochemical ...