CHARGE Repair Guide - battery power circuits on a laptop

Battery Pack:
-Battery cell
-Protection Board
Protection circuit
Gas Gauge IC : BQ2060H
BQ20Z90
-Outer Casing

Rechargeable Battery  Li-Ion Battery  NiMH Battery  NiCad Battery

Features of Li-Ion Battery
 Smaller
 Lighter
 Lower Self-Discharge Rate
 No Memory Effect
 Pollution-Free
 Overcharging or Overdischarging will Cause
Permanent Damage

Over discharge
-for battery spec.
(ex:3.6v Li-Ion, over discharge: under 2.75v~2.5v /cell)
 Over charge
-for battery spec.
(ex:3.6v Li-Ion, 4.3v ~4.35v /cell)
 Self discharge
 Cycle life
-500~1000 (fullemptyfull)

Connecter(Old)

Battery Parameter Record
Charge and discharge counting
Voltage
Temperature
Auto calibration
Battery Status register
Auto calibration
Wake function

Gas Gauge IC –BQ2050H

 Charge  Full Discharge NAC=0 (Discharge complete) Charge Full

Block Diagram for troubleshooting and troubleshooting battery power circuits on a laptop