Acer Aspire 1640 Battery: Worth Replacing Cells or Resetting Electronics?

Question

I have batteries from my used Acer Aspire 1640 laptop it has been years old. Most of the time, the laptop did not run with the battery or it worked for a few minutes, it was used on the power supply only. After disassembling the battery, I checked the voltages on individual cells without load,...

Wiesław Rzepka · Answer

Sony's battery for bq80201, correctly calculates the efficiency of cells. After a few years the links, despite such reading as shown in BatMon, have so much internal resistance that the controller blocks the battery operation. It is also possible a large number of battery charging cycles, but in my opinion you need to replace the cells. You can make an attempt - load a packet of cells with a light bulb as described many times on the forum and write what measurement results without load and which under load.

TOMSON · Answer

I unloaded the cells with 0.7-0.8A current after sucking 0.8Ah of voltage on targets under load counting cells from ground.
1) 3.037V; 2) 3.34V; 3) 3.36V; 4) 3.26V
the temperature of the cells has increased to 32 ° C

No load after unloading:
1) 3.68V; 2) 3.72V; 3) 3.72V; 4) 3.72V

also total cell thread

I have a Panasonic NCR18650B cell but have a larger capacity of 3400mAh 3.6V
could they cooperate with the battery electronics after modifying the settings in the BQ system
After studying a few posts, I tried to read the eeprom as BQ208X
Be2Works in the demo version and succeeded

I saved the batch on the disk and whether this batch can be modified to
owned by PANASONIC.

I have an EV2300 interface and whether to save the batch to the system can only be a full version of the Be2Works program

Wiesław Rzepka · Answer

Of course, only flash changes are needed.

TOMSON · Answer

I attach the saved battery batch for inspection

Wiesław Rzepka · Answer

Please wait. I am in the middle of urgent work.

Added after 30 [minutes]:

be2w demo version will not save you a new flashcamp. I have a 3.28 Cavite version, it supports Sony but only with the bq8030 controller. I can change the data in bq80201, but it has to be read full flash and saved in the srec or senc file. Nothing else can be done at a distance.

TOMSON · Answer

Can this BQ system be read and written on the interface version after LPT because this program with the license for 24 hours is only available under the version for the LPT interface, probably only. How do I put an interface on LPT?

Wiesław Rzepka · Answer

The LPT version is as I remember 2.87 and this is the last one on LPT. It does not support bq8030 or bq80201. Only the new Bohole version 4.20 has changed something, but since I do not have it, I can not check it. In fact, only Sony Tools and the vietnam program directly support bq80201 sony.

TOMSON · Answer

As if the EV2300 version was available for 24h, I would try to try it because I only see LPT versions on the website and the new full program goes almost 835 PLN.

4.15 18/07/2013
BQ80201 SONY firmware added.
Better reading and writing with EV2300 and EV2400 adapters. as you can see from version 4.15, it is already supported.

Wiesław Rzepka · Answer

Yes, I have not looked at the be2w website for a long time. But these versions (as I wrote from version 2.87 which I have) are only under ev2300.

TOMSON · Answer

I installed a program for the BQ2084 system from the TI website and managed to read the laptop battery so I put the photos together.

in the advanced settings is it possible to reset the system, or what to clear all the battery settings?

Wiesław Rzepka · Answer

The Reset bq option restores the controller's factory settings.

krzychu1985^ · Answer

It seemed to me that the reset option will restart the battery, inter alia it will block again (it will set itself to sealed status). If you have these 3400mAh cells, set in flash: design capacity 3400mAh, full charge capacity 3400mAh, remaining capacity 340mAh, cycle count threshold 3060mAh, cycle count on 0 or 1 and the battery should work. Save the original flash before the changes.

TOMSON · Answer

As part of the experiment, I changed the read value full charge capacity
65511mAh at 1900mAh and the link theoretically regained efficiency in the program
RelativeSOC: 7% changed to 100% and AbsoluteSOC: 228% changed to 94%. Charges the charger to see how much capacity they have.
Charging set to 1A the voltage started to grow quickly, i.e. the links have a high internal resistance, I have reduced the current to 0.5A.
after controlling 280mAh, the voltage on the cell is already 16.22V

krzychu1985^ · Answer

It is a waste of time on these links. Maybe 196 cycles are not so much, but the age of links is also important, and these do not belong to the young.

TOMSON · Answer

Have you changed any parameters in the TI to BQ2084 program in the cell configuration.

Wiesław Rzepka · Answer

Krzysiek, this reset option sets the default parameters, but not necessarily the battery will work after this operation. It is always better to manually set the values that we want.

Added after 5 [minutes]:

And so the most important is the calibration of the battery. If after the reset the capacity does not "jump" by itself to the right value, the battery will never calibrate even after several calibrations.

TOMSON · Answer

In the battery I was charging 975mAh charger and this value I entered into the battery is SOC came out to me 21%

The SOC parameter system calculates on the basis of the charge charged and discharged from the cell, I will also see how it will change when using the laptop

TOMSON · Answer

I replaced the batteries with a new one but the system went silent with no communication on the laptop's pins, which was the BAT + voltage and now there is no problem with the system.
I soldered the wires from plus to minus and soldered back from minus to plus

Wiesław Rzepka · Answer

You connected correctly. Check the fuse.

TOMSON · Answer

measurement on the fuse in the horizontal plane is 13.9? and in vertical 0.2? the fuse type is 12Ah4
Or maybe the system went to sleep.
The voltage on the fuse is the same as on 14.56V cells
Maybe now the battery needs to wake up on the BQ2084 application is pin sys pres but this is BQ80201 but it is seen as BQ2084

Wiesław Rzepka · Answer

The program for bq2084 sees bq 80201 but does not support it. For sure, the memory map is different. Entering data in cells is therefore risky.

TOMSON · Answer

The battery was peeling and improved and it started working on new batteries. It could be read again with the TI to BQ2084 program and the voltage appeared on the terminals

Wiesław Rzepka · Answer

Well, just enjoy it. You've fixed your battery.

TOMSON · Answer

I close the topic

With the help of the program from the TI website, it was possible to set parameters for the BQ2084 system after the exchange of cells and the battery on the panasonic 3400mAh cells works 2.5 hours

Acer Aspire 1640 Battery: Worth Replacing Cells or Resetting Electronics?

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