Smart battery, Introduction, Possible smart batteries – Kontron COMe Ref.Carrier-i T10 User Manual
Page 35: Smart battery system manager, 16 smart battery, 1 introduction, 2 possible smart batteries, 3 smart battery system manager
COMe Reference Carrier-i Type 10
/ Connectors and Features
32
5.16 SMART Battery
5.16.1 Introduction
The Core of the SBS is the dual Smart Battery System Manager LTC1760. On COMe Reference Carrier-i Type 10 only one
battery connection is provided.
Smart Battery Systems have the ability to communicate with the application. Therefore the user gets information
about the current state of the battery. The interface for this communication is the System Management Bus (SMBus).
Standard Smart Batteries have a specified 5 pin header, connecting to the power lines and additionally this SMBus.
This standardization allows using all available kinds of standard Smart Batteries, which also applies to the COMe
Reference Carrier-i Type 10.
A typical SBS consists of a Smart Battery System Manager and a charger, which can communicate with the chipset
using the SMBus. If there is no software to control the SBS via SM-bus then the system is able to run in a stand alone
mode with reduced functionality, too.
The SBS was designed for the requirements of the COMe Reference Carrier-i Type 10. Additionally different kinds of
Smart Batteries can be used. That means different battery chemistry and cell configurations. But it must be ensured to
use standard Smart Batteries, which meet the SM-Bus standard.
Note: Please ensure that the input voltage of the COMe Reference Carrier-i Type 10 is higher than the charging
voltage of the connected SMART battery. Otherwise the battery can not be charged.
5.16.2 Possible Smart Batteries
The SBS hardware is configured for a maximum charger output voltage of 8,4V and a maximum output current of 2 A.
Smart Batteries with a nominal voltage of 7,2V, e.g. NiMH and NiCd with 6SxP (= 6 cells in series and x in parallel) or
Li-Ion and LiPo with 2SxP (= 2 cells in series and x in parallel) are possible.
Battery Manufacturer:
e.g. ND2057, NH2057
5.16.3 Smart Battery System Manager
The LTC1760 SBS Manager is a highly integrated level 3 battery charger and selector intended for products using dual
smart batteries. Three SMBus interfaces allow the LTC1760 to servo to the internal voltage and currents measured by
the batteries while allowing a SMBus Host to monitor either battery‟s status. Charging accuracy is determined by the
battery‟s internal voltage and current measurement, typically better then ±0,2%.