#9955 NORM Not Tri: Battery has some issues as below.

Zarro Boogs per Child bugtracker at laptop.org
Thu Jan 7 14:10:07 EST 2010


#9955: Battery has some issues as below.
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           Reporter:  Andy Pei      |       Owner:               
               Type:  defect        |      Status:  new          
           Priority:  normal        |   Milestone:  Not Triaged  
          Component:  not assigned  |     Version:  not specified
         Resolution:                |    Keywords:               
        Next_action:  never set     |    Verified:  0            
Deployment_affected:                |   Blockedby:               
           Blocking:                |  
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Comment(by rsmith):

 Replying to [comment:1 Andy Pei]:

 > > (2)Battery volume auto go to 97% while charging from 86%.

 The full charge marker is not based on time.  The criteria for full is
 Vbatt >= 7.4V and Ibatt <= 120mA.  When this condition is reached the
 battery is marked full and the SOC is set to 97%.

 I can think of 3 possibilities for yout jumping behavior.

 1) If the SOC is out of sync with the battery state then you would see a
 large jump in SOC when
  full is reached.  The fix is to simply try agin.  This time the SOC will
 be in sync with the battery.

 2) Incorrect 1% ACR. Our 1% SOC ACR differance may not be correct anymore
 for the increased charge current of CL1B.

 I ran some tests and although the charge current of CL1B is in general
 400mA  higher than CL1A it does not appear to affect the SOC counter rate
 enough to cause a 11% offset.  I do not beleive this is a problem.

 3) Your battery has lower capactity than expected.  You sould run a full
 discharge/charge cycle and verify the capacity of the battery.  olpc-pwr-
 log will let you verify your capacity.

 > == (./battery_life03 after charging finish check >log.txt) ==

 Rather than battery_life03 please use 'olpc-pwr-log'.  They record the
 same information but olpc-pwr-log does not do the graphics and OLPC has
 other tools that can process the log generate by olpc-pwr-log.

 See: http://wiki.laptop.org/go/XO_power_draw#olpc-pwr-log

 Do you have the log that battery_life03 generated?  If so then please
 attach.

 > (3)Battery voltage and temperature show failed message by executing
 Cl1batt test tool. Add test tool and fail picture.

 What are you using as your pass/fail criteria for Voltage and Temperature?

-- 
Ticket URL: <http://dev.laptop.org/ticket/9955#comment:5>
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