This image displays a functional block diagram of a battery management system (BMS), likely for a lithium-ion battery pack. The diagram details various stages of battery monitoring and control. It showcases cell voltage monitoring, balance control, a boost converter (VREG), Analog to Digital Converters (ADCs) for voltage and current measurement, temperature sensing, and safety features like overcurrent and undervoltage alerts. The core of the diagram includes multiple cell monitoring blocks (VC0 to VC7), a multiplexer (CELL MUX), and a control block for balance and level shift.
Ocr Text
8.2 Functional Block Diagram
→ PACK+
Hold-up circuit
(optional)
Rpull
Zener
D1
Cbat
VCC6
Rpull
C6
Bal Select
Bal Select
Cell Select
REGS
EE
I2C
SCL
I2C
Interface
SDA
VREF
REF×0.85
Amp
Gain = 0.3, 0.6
VOUT
Comparator
ITTHRESH
25.50, 75.100, ...400 mV
bg76925
VREG
POR
V3P3
VCTL
Bypass FET (optional)
3.3V
μC/LED
Supply
Cbat
VC5
Rpull
VC4
Rpull
VC3
Rpull
VC2
Rpull
VC1
Rpull
VCO
SENSEN
SENSEP
Rsensen
Rsensep
Polarity Select
Gain Select
Gain 8
Output Range = 1V, 2V
Level Shift Control
Balance
NTC/Rtc Switch
NTC Switch
ADC Ch 1
Cell Voltage
ADC Ch 2
Cell Current
ADC Ch 3
Pack Current
Wakeup
Alert
Overcurrent
ALERT
