Psion Inc 7505BTMC75 ユーザーズマニュアル

Description

Specification

Communication interface

Smart Management Bus (SMB)

Internal Battery Data

Dependent upon cell parameters. Vendor to calculate and provide 
data.

Charge control

CV 4.2V, CC5.0A- dependant on cell manufacturer, Pre-charge 
100mA, Current taper 100 - 250mA

Fuel gauge

Texas Instruments BQ27350PW 

Accuracy: +/- 1% of remaining battery capacity 

Resolution: 10 steps minimum

Calibration

Self Calibrating

Current accuracy

Charge/discharge: +/- 5%

Voltage accuracy

Charge/discharge: +/- 1%, measured at cell stack

Battery temperature

+/- 5°C (from -20°C to +60°C)

Battery Authentication

Texas Instruments BQ26100 SHA-1 encryption

Series resistance

Max. 180m  (contact + shunt + safety components + cells) 

Internal electronics consump-
tion

Normal operation 300µA Max
Power-down Mode 20µA Max 

Description

Specification

Internal Protection

Over-temperature: thermal fuse disconnect above 90°C
Over-voltage: temporary disconnect if any cell voltage > 4.40V (discharge not inhibited)
Electronics shall support 5.0A continuous load at 60°C without tripping the protection 
circuit.
Over-current: temporary disconnect above 10.0A for > 20ms 
[shorting of battery terminals shall not damage the electronics or cells. Over current pro-
tection will have two series devices - Polyswitch/ fuse and switch FETs.]
Under-voltage: temporary disconnect if total cell voltage < 2.75V (protection circuit to 
enter power-down mode and gas gauge function should be prohibited, but data shall not 
be lost as long as one cell is over 1.5V.)