Usage with Arduino Uno + Resetting failure bit

[Bixilon]

Hi there,
thanks for your projects, amazing. I can readout data. I am using an Arduino Uno in the SMD Edition (see the attached picture).

I needed to set the following pings. The arduino has 1 SCL and 1 SDL pin, that are bridged to A4/A5.

#define SDA_PORT PORTC
#define SDA_PIN 5

#define SCL_PORT PORTC
#define SCL_PIN 4

I got an lenovo 57++ Battery from my W540. While replacing the cells, I made 1 stupid mistake and the fuse blow and the failure bit got set. I really want to remove the bit, the fuse is not the problem. How should I face the issue?

Luckily I have 2 batteries. See the data

Broken one:

Manufacturer Name: LGC<break>
Device Name: LNV-45N1153
Chemistry LION
Design Capacity: 9946
Design Voltage: 11100
Manufacture Date (Y-M-D): 2015-10-23
Serial Number: 2006
Specification Info: 49
Cycle Count: 268
Voltage: 11.89
Full Charge Capacity: 2907
Remaining Capacity: 0
Relative Charge(%): 0
Absolute Charge(%): 0
Minutes remaining for full charge: -1
Cell 1 Voltage: 18326
Cell 2 Voltage: 12033
Cell 3 Voltage: 0
Cell 4 Voltage: 19472
State of Health: 8
Battery Mode (BIN): 0b11111111111111111110000000100100
Battery Status (BIN): 0b101110010000
Charging Current: 0
Charging Voltage: 0
Temp: 25.15
Current (mA): 0

Working one:

Manufacturer Name: LGC<break>
Device Name: LNV-45N1147
Chemistry LION
Design Capacity: 5616
Design Voltage: 10800
Manufacture Date (Y-M-D): 2015-2-17
Serial Number: 5270
Specification Info: 49
Cycle Count: 196
Voltage: 12.33
Full Charge Capacity: 4382
Remaining Capacity: 4313
Relative Charge(%): 98
Absolute Charge(%): 76
Minutes remaining for full charge: -1
Cell 1 Voltage: 18544
Cell 2 Voltage: 11009
Cell 3 Voltage: 0
Cell 4 Voltage: 19472
State of Health: 8
Battery Mode (BIN): 0b11111111111111111110000010100100
Battery Status (BIN): 0b10100000
Charging Current: 0
Charging Voltage: 0
Temp: 30.35
Current (mA): 0

When I diff the Batter Mode (BIN), you can see that 1 bit is different. The 7th. But also the status is quite different. I have to admit, it is not the exact same battery, the broken one is the 9cell one, the working one is the 6cell one.

I hope to hear from you.

Thanks

Moritz

[Krishna-Noutiyal]

Hey I am working on the same project and from my research most of the laptop BMS have a BMS IC, these ICs are sometimes closely marketed ( not sold in the consumer market ), This means they are only available for production and are sold to companies. These ICs have all the features built right into them ( These are called System On Chip ICs or SOCs) and store the information in ROM of the chip itself. This means if you want to alter the fail safe bit you will have to read and write to the chip itself.