Rebuild battery with bq29330 & bq8030

Discussion in 'The Projects Forum' started by jakoh, Aug 16, 2012.

  1. jakoh

    Thread Starter New Member

    Nov 22, 2010
    2
    0
    first, why you cant find info on the bq8030xxx (see last post)
    http://e2e.ti.com/support/power_management/battery_management/f/180/t/196237.aspx



    i am trying to fix the same problem

    http://forum.allaboutcircuits.com/showthread.php?t=55241.



    the battery voltage is reported right and it even determines the proper capacity (i only put three new cells) but current is 0. So what i was thinking was it must be able to measure the voltage some separate way and something is stopping the current from flowing. So i found a meltable fuse on the back. http://www.sonycid.jp/en/products/dd6/sfh0412b.html


    It seems to be open. I ll bypass the fuse and report.



    everyone is gotto protect their revenue streams. what load of crap.
     
  2. wayneh

    Expert

    Sep 9, 2010
    12,127
    3,048
    How is protecting your revenue stream a "load of crap"? Why would anyone bother going to work each day if not to generate revenue and a paycheck?

    And if you're complaining about TI not providing a public service, why should they? Their corporate customer/partners have paid big bucks for proprietary circuitry. Teaching the public about these components, which are not for sale, costs money and resources. It's unreasonable to expect TI to provide tech support for something they don't sell. Good grief.

    Venting out of the way, I'll be curious to hear your results. Something caused that fuse to blow. Heat? A short somewhere?

    Since these batteries are capable of exploding, proceed with caution. :eek:
     
  3. jakoh

    Thread Starter New Member

    Nov 22, 2010
    2
    0
    My mistake, what i meant was lenovo engineering their batteries so they cant be rebuilt after their batteries "fail" in an year because of cell imbalance and charging 500% markup to buy a new one is a "boatload of crap." TI not providing specs was not what i meant.

    Regardless, I jumped the fuse (still installed) but still the battery will not provide current. I think they must have disabled the PCB, so even if you attach new cells, the chip will not work with them after it failed once, including blowing the fuse. Or it must sense that the fuse is blown, seems like a controlled fuse, blowable through resistors.
     
  4. gim461

    New Member

    Jan 12, 2013
    3
    1
    The microcontroller will have set a Permanent Failure Flag when it blew the fuse. You need to reset the microcontroller. To do this you need an EV2300 interface board available from TI. You connect the interface board between your battery circuit board and your PC. You need software which is available for free from TI. There are also lots instruction documents available from TI.
     
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