Paste good quality pictures of the pcb from both sides. 

Posted by: @djibattworkshop

Paste good quality pictures of the pcb from both sides. 

I managed to expose the soldered terminals on the board by removing the resin/glue using a blade.

After charging the cells, I managed to unlock the battery using the RESET tab but it's not charging because of the TERMINATE_CHARGE_ALARM

How can I fix this?

Thanks

Posted by: @kevin

but it's not charging because of the TERMINATE_CHARGE_ALARM

There is also TERMINATE_DISCHARGE_ALARM.

Both TCA and TDA triggering in two cases

- PFF still exist and not cleared

- SP not connected to ground

Paste snapshot from Reset tab with PF Status and OpStatus decoded flags. 

Posted by: @djibattworkshop

Posted by: @kevin

but it's not charging because of the TERMINATE_CHARGE_ALARM

There is also TERMINATE_DISCHARGE_ALARM.

Both TCA and TDA triggering in two cases

- PFF still exist and not cleared

- SP not connected to ground

 

According to this post, there is no SP pin on this battery. I will check the schematics carefully to see if there are any enable or system present pins.

https://www.laptopu.ro/community/pinouts-for-apple-batteries/pinout-request-for-apple-a1713/#post-8698

With regards to the lock, the RESET tab reports this:

ManufacturerName = DSY
DeviceName = bq20z451
DeviceChemistry = LION
DesignCapacity = 4790 mAh
ManufactureDate = 23.9.2017
DesignVoltage = 11420 mV
Temperature = 33.85 C
Voltage = 9697 mV
Current = 0 mA
MaxError = 1 %
RelativeStateOfCharge = 0 %
RemainingCapacity = 0 mAh
FullChargeCapacity = 4126 mAh
ChargingCurrent = 0 mA
ChargingVoltage = 0 mV
BatteryStatus = 4AD0
CycleCount = 350
Cell Voltage1 = 3224 mV
Cell Voltage2 = 3240 mV
Cell Voltage3 = 3233 mV

1340
Detected chip (database) = BQ20Z451
Detected chip (SMBus) = BQ20Z451 FW v9.01

This chip is supported = BQ20Z451 -> Press Next button

1346
Chip Information:
OperationStatus = Sealed
PFStatus = 0000

Thanks

Posted by: @kevin

According to this post, there is no SP pin on this battery

Well, what NLBA1 shows for this battery in its database?

From my practice all Apple MacBook batteries which was in my workshop had SP pin, including modern case-free design. 

Posted by: @kevin

1346
Chip Information:
OperationStatus = Sealed
PFStatus = 0000

 

It says SP not connected. OpStatus should have PRESS flag even if this laptop does not have such line. 

Posted by: @djibattworkshop

Posted by: @kevin

According to this post, there is no SP pin on this battery

Well, what NLBA1 shows for this battery in its database?

There ar no pin out in the database. I added them now.

From my practice all Apple MacBook batteries which was in my workshop had SP pin, including modern case-free design. 

Posted by: @kevin

1346
Chip Information:
OperationStatus = Sealed
PFStatus = 0000

 

It says SP not connected. OpStatus should have PRESS flag even if this laptop does not have such line. 

I figured it out. It has an SP pin but it's not on the main battery connector. There is an auxiliary ribbon cable from the battery connector to the mainboard. That should be connected to the mainboard (to short the SP to ground) when charging through NLBA.

Thanks

Same ribbon cable contains GND, SCL and SDA lines, correct?

Does PRESS flag appeared under the Chip Information tag after you have connected it to ground?

Paste updated snapshots of the BatInfo and Reset pages to close the thread. It could be useful for another customers encountering same issue. Thanks!

Posted by: @kevin

Posted by: @djibattworkshop

Posted by: @kevin

According to this post, there is no SP pin on this battery

Well, what NLBA1 shows for this battery in its database?

There ar no pin out in the database. I added them now.

From my practice all Apple MacBook batteries which was in my workshop had SP pin, including modern case-free design. 

Posted by: @kevin

1346
Chip Information:
OperationStatus = Sealed
PFStatus = 0000

 

It says SP not connected. OpStatus should have PRESS flag even if this laptop does not have such line. 

I figured it out. It has an SP pin but it's not on the main battery connector. There is an auxiliary ribbon cable from the battery connector to the mainboard. That should be connected to the mainboard (to short the SP to ground) when charging through NLBA.

 

Thanks

can you indicate which is the SP pin on the BMU sensor flex you mention ? It would be great to know, so that we can try to ground this pin without having to connect the battery to a motherboard to read the battery info!