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Battery Management

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  • Forum Post: 12vdc BATTERY LEVEL MONITOR

    Mike Barnacastle
    Hello all: Does TI offer a simple battery voltage level indicator for a sealed lead acid battery, 12VDC? We use an off the shelf UB1280 8AH battery in our 'to go kit' sat radio cases, and my source that we obtained a simple battery monitor / level board from has "gone away" Basically...
    on Oct 29, 2009

  • Forum Post: Re: Gas Gauge for VRLA & BQ24450

    dMax
    Hi Alfonso, The bq2019 and bq2023 are actually chemistry independent and will work fine with lead acid batteries. The datasheet says "ideal for Li & NiMH" but they can be used for any chemistry. They are simple battery monitors which track voltage, temperature, and count coulombs. It...
    on Jan 14, 2010

  • Forum Post: bq77lp900 ground

    Doug Heermann
    Should the GND pins of the BQ77LP900 be connected to the negative terminal of the battery or the pack (which side of the current sense resistor)? The BQ77LP900 eval kit has them connected to the battery side but has options for both. App notes and reference designs for other BMS chips (e.g. SLUA340B...
    on Feb 24, 2010

  • Forum Post: Re: bq77lp900 ground

    WM5295
    In systems with a gas gauge, external communication is a key part of the system. Having the ground reference at the pack side of the sense resistor keeps the sense resistor from modulating the communication lines with load current changes. The bq77PL900 is anticipated to be used in systems with high...
    on Feb 26, 2010

  • Forum Post: 4 Cell Removable Battery Fuel Gauging Solution

    Tom47637
    Hi Everyone, I'm looking for a solution that can fuel gauge a 4 Series Cell LiPo battery (10000mAh, 14.8V) and report pack information over SMBus or I2C. However the battery is removable and will be charged externally, furthermore the cell taps are not accessible. I've been looking through...
    on Apr 16, 2010

  • Forum Post: need a help about backup battery bq24070

    lilly
    Hello! I'm looking for some circuit to monitor the state of battery pack. Tried to search from product list, but it seems a bit to many products and i failed looking for the right one, maybe I was looking in a wrong place. I need a <500ma and 3.3V battery.when power is ON the battery should...
    on Apr 21, 2010

  • Forum Post: BQ27510 Production Code

    Nick Moore
    I have written the firmware to program the BQ27510 from the three page flow chart from Going to Production with the bq2750x. However, every time I read register 0x66 to see if the data=0x00 I get the data to equal 0x37. Does anyone have any idea why this might be happening? I'm thinking maybe...
    on Jun 22, 2010

  • Wiki Page: bq26221 time to empy and time to full estimation

    Antonio Fadhel
    Q: bq26221 time to empy and time to full estimation by 1187761 Hi, I'm going to write a linux device driver for bq26221 and I would like to know, if there are some algorithmic to estimate the time to empy and time to full of the battery using the DTC and CTC register and how can I estimate...
    on Jul 12, 2010

  • Wiki Page: BQ2013 HDQ Communication

    Jared Casey
    Q: BQ2013 HDQ Communication by 1408142 Hello, I have a rabbit 5600 controller sending a command string over the HDQ wire to a BQ2013EVM unit. With the use of a MSO-19 (pc based scope/logic analyzer) I can estimate the width of the signal pulses. The string format consists of a BRAKE LSB to MSB but...
    on Jul 12, 2010

  • Forum Post: Gas Gauge for 12V, 6000mAh NiMH battery pack

    Matthew Karau
    I'm looking for a (stand-alone with serial I/F) gas gauge / coulomb counter that is compatible with a 10-cell (12V, 6000mAh) NiMH pack. My searches on TI.com have returned ICs specifically compatible with Li+ and Li-Poly packs or lower voltage NiMH packs. Can anyone advise if these ICs can be easily...
    on Aug 2, 2010

  • Forum Post: bq78pl114 firmware support for high current/capacity cell

    Evgen Urlep
    Dear sir, We are intending to use bq78pl114 to manage 160 Ah battery cells LiFePo4 from ThunderSky TSLFP160AHA (Voltronix). Is possible to obtain chemistry files / make own chemistry setup of that cell type? Discharge currents 3C are beyond 480 A (Current application will support up to 300 A...
    on Sep 8, 2010

  • Forum Post: BQ32000 RTC

    Itzik Mizrachi
    (1) At first power-up, the time registers have gibrish values in them, and the UBOOT (initial code that is running during boot) needs to have special code to update them before the Linux driver can even access it. Usually RTC is supposed to wake up with some initial value (that is not gibrish). ...
    on Sep 12, 2010

  • Forum Post: BQ32000 -external capacitors

    Itzik Mizrachi
    Does the crystal connected to the BQ32000 need external capacitors?
    on Sep 12, 2010

  • Forum Post: Problem writing the data flash block in a bq27501

    Orval Neil
    I've been having some difficulty writing the contents of the Blockdata() area to flash. I'm using the sequence below with: fOk = BatteryPDDWriteChar(GAUGE_EXTCMD_DFDCNTL, 0); fOk = BatteryPDDWriteChar(GAUGE_EXTCMD_DFCLS, subclass); fOk = BatteryPDDWriteChar(GAUGE_EXTCMD_DFBLK, block...
    on Sep 29, 2010

  • Forum Post: BQ77PL900: problem with reading pack/ batt voltage in host mode

    Gabba
    Hi, I have a problem with the reading of the voltage at pack/bat pin, even if i read the correct voltage of each single cell(then ADC works fine). Using a 12 bit ADC with 3.3V full scale range,i calculate the pack/batt voltage with the formula: (ADC_bits / 4096)* 3.3 * 50. Is it correct? ...
    on Sep 30, 2010

  • Forum Post: Gas Gauge needed

    Alfredo Grajales
    I´m using a bq24070 to charge a li-ion batt in a portable app as a college project. I use solar cells to provide energy to the system and the batt. I read a little about battery gas gauge ICs to monitor the battery. but I really don´t know how to include that technology in may project. Please...
    on Oct 11, 2010

  • Forum Post: Current measurement of bq78pl114

    Evgen Urlep
    Due to mechanical restriction it is not possible to set the current measurement shunt between Ubat- and PACK-, but only between V1 and V2. Seems that then the voltage shift of the current measurement is required. Are there any low power recomendation solutions. Is battery balancing and voltage protection...
    on Oct 28, 2010

  • Forum Post: Can you recommend a device?

    zou jason
    Our backup power need to support 50v . I used atmel406 array to do this job. We need a new application as comparison. I hope it can integrate charger,monitor,protected. Of course ,it just my hope.If it can not be integrated in a chip.Series chips are good. Thanks for your advices.
    on Dec 10, 2010

  • Forum Post: bq2060a difficulty

    Priya Ganadas
    Hello everyone, We have made custom board of bq2060a. We are using AT24C02a EEPROM. We have calibrated all registers. For time being we have disabled all corrections and degradation factors. We are stuck in following- 1. When we read monitor with the help of AT91SAM7X micro controller, we can successfully...
    on Dec 18, 2010

  • Forum Post: Internal temp sensor on bq27501

    Roger Yttervik
    Hi I am having problems configuring my bq27501 to use the internal temp sensor. I have left the TS pin floating, however this should not be a problem since I dont intend to use the external sensor. When I look at the Operations config flags, TEMPS flag is red... Does this mean that it is configured...
    on Jan 12, 2011

  • Forum Post: RID on bq27501

    Roger Yttervik
    Hi We are implementing your bq27501 battery monitor. We are having problems with the RID function... The monitor does not seem to react to the change in RID resistor. Could you please explain when this test is done and how the test is performed. ie.... Is it done only apon battery insertion or a reset...
    on Jan 12, 2011

  • Forum Post: BQ77PL900 5 - Cells

    Paolo Lisanti
    Hi, I've a problem with five cells connection with IC BQ77PL900. I've read information reported in its tecnical Documents and I've done: - Set Configuration bits (CNF2 = Vreg2 , CNF1 = 0, CNF0 = Vreg2) to Vreg2 (3.3v) by a 100k resistor, or to GND. Is it normal that i read 2.6v at...
    on Jan 19, 2011

  • Forum Post: Unable to do complete RESET on BQ27501

    Roger Yttervik
    Hi I have come across a strange issue regarding RESET on the BQ27501. I am using the EVSW connected to pcb which we have designed, containing a bq27501. I have 2 battery packs with completely diiferent chemisteries. They do NOT however have RID sense resistors. I must therefore simulate these...
    on Jan 21, 2011

  • Forum Post: BQ2060A EVM for lead acid?

    James Konish
    I would like to evaluate the BQ2060A for use in a lead acid battery pack. I see there are EVM's for NiMH and Li-ion/Li-polymer; could one of these be adapted for use with lead acid batteries, or is there a breakout board/EVM available from a third party, just to get up and running faster? Thanks...
    on Mar 25, 2011

  • Forum Post: bq77PL900

    Larry Shilkoff
    Does anyone know what level of accuracy one can expect from the cell measurements with the bq77PL900? This would include implementing the calibration factor from the calibration procedure for the chip.
    on Mar 28, 2011
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