BBU Batteries Do Not Fully Charge up to 100% of Available Capacity

Asset ID:	1-72-1669359.1
Update Date:	2018-04-09
Keywords:

Solution Type Problem Resolution Sure

Solution 1669359.1 : BBU Batteries Do Not Fully Charge up to 100% of Available Capacity

Applies to:

Exadata X3-2 Hardware - Version All Versions to All Versions [Release All Releases]
Exadata Database Machine V2 - Version All Versions to All Versions [Release All Releases]
Exadata Database Machine X2-2 Hardware - Version All Versions to All Versions [Release All Releases]
Information in this document applies to any platform.

Symptoms

RAID controller firmware version 12.12.0-178

The battery will run charge/learn cycles approximately every two days .

The battery charge may not show 100% despite a new battery being fitted.

An example below after using the command :

/opt/MegaRAID/MegaCli/MegaCli64 -adpbbucmd -a0

BBU Capacity Info for Adapter: 0

  Relative State of Charge: 65 %
  Absolute State of charge: 52 %
  Remaining Capacity: 791 mAh
  Full Charge Capacity: 1218 mAh
  Run time to empty: Battery is not being charged.
  Average time to empty: 1 Hour, 35 Min.
  Estimated Time to full recharge: Battery is not being charged.
  Cycle Count: 4

BBU Design Info for Adapter: 0

  Date of Manufacture: 06/15, 2012
  Design Capacity: 1500 mAh
  Design Voltage: 4100 mV
  Specification Info: 0
  Serial Number: 9107
  Pack Stat Configuration: 0x0000
  Manufacture Name: LS36691
  Firmware Version   :
  Device Name: bq27541
  Device Chemistry: LION
  Battery FRU: N/A
  Transparent Learn = 0
  App Data = 0

Events log also shows charge cycles are short and more frequent compared to previous firmware versions.

seqNum: 0x00001625
Time: Sun Feb 23 04:48:39 2014

Code: 0x00000093
Class: 0
Locale: 0x08
Event Description: Battery started charging
Event Data:
===========
None


seqNum: 0x00001626
Time: Sun Feb 23 04:52:59 2014

Code: 0x000000f2
Class: 0
Locale: 0x08
Event Description: Battery charge complete
Event Data:

seqNum: 0x00001627
Time: Mon Mar  3 12:51:59 2014

Code: 0x00000093
Class: 0
Locale: 0x08
Event Description: Battery started charging
Event Data:
===========
None


seqNum: 0x00001628
Time: Mon Mar  3 12:56:19 2014

Code: 0x000000f2
Class: 0
Locale: 0x08
Event Description: Battery charge complete

Changes

RAID controller firmware 12.12.0-178

Cause

Battery does not need to charge to 100%, it will only charge to mAh needed for 2 days of data retention. As battery ages, this percentage will get larger. This allows the unused battery to age slower.

Solution

Default behaviour with firmware 12.12.0-178

Attachments

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