Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

Dynamic-load circuit determines a battery’s internal resistance

Dynamic-load circuit determines a battery’s internal resistance

by Jim Williams @ end.com

The simplest model of a battery comprises an ideal voltage source that connects in series with a resistance whose value—often a few milliohms—depends on the battery’s electrochemical condition and construction. If you attempt to use an ordinary ac milliohmmeter containing a kilohertz-range ac excitation source to measure a battery’s internal resistance, you get erroneous results due to capacitive effects, which introduce losses. A more realistic battery model includes a resistive divider that a capacitor partially shunts (Figure 1). In addition, a battery’s no-load internal resistances may differ significantly from their values under a full load. Thus, for greatest accuracy, you must measure internal resistance under full load at or near dc.

Dynamic-load circuit determines a battery’s internal resistance – [Link]

The post Dynamic-load circuit determines a battery’s internal resistance appeared first on Electronics-Lab.







 

More Articles to Read

App note: Using Cymbet™ EnerChip™ batteries instead of coin cells and super capacitors
App note: Using Cymbet™ EnerChip™ batteries instead of coin cells and super capacitors
A low-voltage disconnect for 12 volt lead acid and lithium batteries
A low-voltage disconnect for 12 volt lead acid and lithium batteries
Not a battery or a supercap, but a ‘thin laminate energy device’
Not a battery or a supercap, but a ‘thin laminate energy device’
Build an Arduino boost converter
Build an Arduino boost converter
Maximize the Energy from Long-Life Batteries
Maximize the Energy from Long-Life Batteries
Running NodeMCU on a battery
Running NodeMCU on a battery
Battery-charging considerations for low-power applications [PDF]
Battery-charging considerations for low-power applications [PDF]
The AAduino
The AAduino
Rechargeable batteries with nanowires last forever
Rechargeable batteries with nanowires last forever
Supercapacitors to replace batteries?
Supercapacitors to replace batteries?
One step closer to the ‘ultimate battery’
One step closer to the ‘ultimate battery’
Automatic 18650 Analyzer
Automatic 18650 Analyzer
App note: Fast charging control with NTC temperature sensing
App note: Fast charging control with NTC temperature sensing
Power Management Solutions: Battery Chargers
Power Management Solutions: Battery Chargers
Charger interface IC avoids handset overheating at fast-charge rates
Charger interface IC avoids handset overheating at fast-charge rates
Arduino Battery Shield
Arduino Battery Shield
IC monitors multicell battery packs
IC monitors multicell battery packs

Top


Shares