Passive Balancing Allows All Cells to Appear to Have the Same Capacity: Page 2 of 2

September 18, 2019 // By Sam Nork and Kevin Scott, Analog Devices
Passive Balancing Allows All Cells to Appear to Have the Same Capacity
In the automotive and transportation marketplace, large battery stacks provide high output power without producing harmful emissions (that is, carbon monoxide and hydrocarbons) associated with gasoline-powered combustion engines. Ideally, each individual battery in the stack equally contributes to the system. However, when it comes to batteries, all batteries are not created equally. Even batteries of the same chemistry with the same physical size and shape can have different total capacities, different internal resistances, different self-discharge rates, etc. In addition, they can age differently, adding another variable in the battery life equation.

About the Authors

Sam Nork has worked for Analog Devices’ Power Products Business Unit (previously Linear Technology) since 1988. As a general manager and design director, Sam leads a development team of over 120 engineers focused on battery charger, ASSP, PMIC, and consumer power products. He has personally designed and released numerous portable power management integrated circuits, and is inventor/co-inventor on 11 issued patents. Prior to joining Linear Technology, Sam worked for Analog Devices in Wilmington, MA as a product/test development engineer. He received A.B. and B.E. degrees from Dartmouth College. He can be reached at

Kevin Scott works as a product marketing manager for the Power Products Group at Analog Devices, where he manages boost, buck-boost, and isolated converters, as well as drivers and linear regulators. He previously worked as a senior strategic marketing engineer, creating technical training content, training sales engineers, and writing numerous website articles about the technical advantages of the company’s broad product offering. He has been in the semiconductor industry for 26 years in applications, business management, and marketing roles.

Kevin graduated from Stanford University in 1987 with a B.S. in electrical engineering and started his engineering career after a brief stint in the NFL. He can be reached at

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