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Recelled Laptop battery now it won't charge Help Please...

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adrian1472

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Recelled Laptop battery now it won't charge Help Please...
« on: February 09, 2012, 08:54:14 PM »
Hello,

I followed the instructions on the site about recelling a lithium ion battery pack but unfortunately it didn't work out quite right.

I have a 6 cell battery pack from my gateway which I recelled when I put the battery back in the laptop it ran the laptop but it wouldn't charge when I plugged it in. So I ran it down hoping that it may charge once the voltage dropped, I was wrong.  I don't really know where to go from here. Here is some of the info from about the battery that may be helpful.

adrian8@gateway-ubuntu-sda8:~$ cat /proc/acpi/battery/BAT0/info
present:                 yes
design capacity:         57720 mWh
last full capacity:      11888 mWh
battery technology:      rechargeable
design voltage:          11100 mV
design capacity warning: 3996 mWh
design capacity low:     0 mWh
cycle count:        0
capacity granularity 1:  355 mWh
capacity granularity 2:  355 mWh
model number:            W35052LB
serial number:           111005200                         
battery type:            4C 69 00 00 00
OEM info:                 Gateway
adrian8@gateway-ubuntu-sda8:~$ cat /proc/acpi/battery/BAT0/state
present:                 yes
capacity state:          ok
charging state:          charging
present rate:            0 mW
remaining capacity:      1 mWh
present voltage:         10974 mV
adrian8@gateway-ubuntu-sda8:~$ acpi -V
Battery 0: Charging, 0%, charging at zero rate - will never fully charge.
Battery 0: design capacity 5259 mAh, last full capacity 1083 mAh = 20%
Adapter 0: on-line
Thermal 0: ok, 52.0 degrees C
Thermal 0: trip point 0 switches to mode critical at temperature 100.0 degrees C
Cooling 0: LCD 0 of 7
Cooling 1: Processor 0 of 10
Cooling 2: Processor 0 of 10

Thank in advance for any help.

Hero999

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Re: Recelled Laptop battery now it won't charge Help Please...
« Reply #1 on: February 10, 2012, 03:09:29 AM »
A safety feature of battery management systems is to refuse to charge the battery again once the voltage has dropped below a certain level. The only way round it is to reset the battery management system.

adrian1472

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Re: Recelled Laptop battery now it won't charge Help Please...
« Reply #2 on: February 10, 2012, 02:44:57 PM »
Thanks for the reply, I wish I knew this before I would of soldered a set of cells to the board before replacing the old cells. I guess you have to make mistakes to learn.

How could you reset the battery management system?