Smart Battery System (SBS) is a specification for managing a

smart battery A smart battery or a smart battery pack is a rechargeable battery pack with a built-in battery management system (BMS), usually designed for use in a portable computer such as a laptop. In addition to the usual positive and negative terminal ...

, usually for a

portable computer A portable computer is a computer designed to be easily moved from one place to another and included a display and keyboard together, with a single plug, much like later desktop computers called '' all-in-ones'' (AIO), that integrate the sy ...

. It allows

operating system An operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may also in ...

s to perform

power management Power management is a feature of some electrical appliances, especially copiers, computers, computer CPUs, computer GPUs and computer peripherals such as monitors and printers, that turns off the power or switches the system to a low-power stat ...

operations via a

smart battery charger A smart battery or a smart battery pack is a rechargeable battery pack with a built-in battery management system (BMS), usually designed for use in a portable computer such as a laptop. In addition to the usual positive and negative terminals, ...

based on remaining estimated run times by determining accurate

state of charge State of charge (SoC) is the level of charge of an electric battery relative to its capacity. The units of SoC are percentage points (0% = empty; 100% = full). An alternative form of the same measure is the depth of discharge (DoD), the inverse ...

readings. Through this communication, the system also controls the battery charge rate. Communication is carried over an

SMBus The System Management Bus (abbreviated to SMBus or SMB) is a single-ended simple two-wire bus for the purpose of lightweight communication. Most commonly it is found in computer motherboards for communication with the power source for ON/OFF instru ...

two-wire communication bus. The specification originated with the Duracell and Intel companies in 1994, but was later adopted by several battery and semiconductor makers. Henk Jan Bergveld, Wanda S. Kruijt, Peter H. L. Notten '' Battery management systems: design by modelling'' Springer, 2002 pages 20-22 The Smart Battery System defines 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 In computing, BIOS (, ; Basic Input/Output System, also known as the System BIOS, ROM BIOS, BIOS ROM or PC BIOS) is firmware used to provide runtime services for operating systems and programs and to perform hardware initialization during the ...

interface for control. In principle, any battery operated product can use SBS. A special

integrated circuit An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small flat piece (or "chip") of semiconductor material, usually silicon. Large numbers of tiny ...

in the battery pack (called a fuel gauge or battery management system) monitors the battery and reports information to the

. This information might include battery type, model number, manufacturer, characteristics, charge/discharge rate, predicted remaining capacity, an almost-discharged alarm so that the PC or other device can shut down gracefully, and temperature and voltage to provide safe fast-charging.

References

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External links

SBS-IF Smart Battery System Implementers ForumBattery Firmware Hacking Inside the innards of a Smart Battery
Rechargeable batteries Battery charging

See also

References

External links