Smart Battery System
Encyclopedia
Smart Battery System is a specification for determining accurate battery
capacity readings. It allows operating system
s to perform power management
operations based on remaining estimated run times. Through this communication, the system also controls the amount the battery is charged. Communication is carried over an SMBus two-wire communication bus. The specification originated with the Duracell and Intel companies in 1994, but was later adapted by several battery and semiconductor makers.
The Smart Battery System define the SMBus connection, the data that can be sent over the connection (Smart Battery Data or SBD), the Smart Battery Charger, and a computer BIOS
interface for control. In principle, any battery operated product can use SBS, but in practice only laptop computers use the system.
A special integrated circuit
in the battery pack monitors the battery and reports information to the SMBus. This information might include battery type, model number, manufacturer, characteristics, discharge rate, predicted remaining capacity, an almost-discharged alarm so that the PC or other device can shut down gracefully; temperature and voltage to provide safe fast-charging.
Battery (electricity)
An electrical battery is one or more electrochemical cells that convert stored chemical energy into electrical energy. Since the invention of the first battery in 1800 by Alessandro Volta and especially since the technically improved Daniell cell in 1836, batteries have become a common power...
capacity readings. It allows operating system
Operating system
An operating system is a set of programs that manage computer hardware resources and provide common services for application software. The operating system is the most important type of system software in a computer system...
s to perform power management
Power management
Power management is a feature of some electrical appliances, especially copiers, computers and computer peripherals such as monitors and printers, that turns off the power or switches the system to a low-power state when inactive. In computing this is known as PC power management and is built...
operations based on remaining estimated run times. Through this communication, the system also controls the amount the battery is charged. Communication is carried over an SMBus two-wire communication bus. The specification originated with the Duracell and Intel companies in 1994, but was later adapted by several battery and semiconductor makers.
The Smart Battery System define the SMBus connection, the data that can be sent over the connection (Smart Battery Data or SBD), the Smart Battery Charger, and a computer BIOS
BIOS
In IBM PC compatible computers, the basic input/output system , also known as the System BIOS or ROM BIOS , is a de facto standard defining a firmware interface....
interface for control. In principle, any battery operated product can use SBS, but in practice only laptop computers use the system.
A special integrated circuit
Integrated circuit
An integrated circuit or monolithic integrated circuit is an electronic circuit manufactured by the patterned diffusion of trace elements into the surface of a thin substrate of semiconductor material...
in the battery pack monitors the battery and reports information to the SMBus. This information might include battery type, model number, manufacturer, characteristics, discharge rate, predicted remaining capacity, an almost-discharged alarm so that the PC or other device can shut down gracefully; temperature and voltage to provide safe fast-charging.