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BE34Z110 - Using a Hall Effect Current Sensor + Wireless Connectivity

Gerard Bree
Prodigy 20 points
Other Parts Discussed in Thread: BQ34Z110

Dear Sir/Madam,

We are considering incorporating the BQ34Z110 into a lead acid battery monitoring system, however the battery system is an existing one (consisting of several bats in a string) and we do not wish to interrupt it. Can we measure current by connecting a Hall Effect Current Sensor to pins SRN & SRP?

Also, I would appreciate if anyone could suggest ways to wireless connect each BQ34Z110 to a central, readable hub.

Thanks,

Ger

  • 0
    Genius 3970 points

    Theoretically you could use a non-contact means like a Hall effect sensor to measure current, but it likely can't be used directly with the bq34z110. You'll need some means of scaling the sensor's output to the +/- 125 mV on SRP/SRN. I'm not aware of any TI app notes that describe the use of alternative current sensing on their gas gauges.

    Interfacing the bq34z110 wirelessly would require an external microcontroller and RF transceiver. TI has microcontrollers that can do wireless transmission without the need for a separate radio IC; the MCU would use I2C to talk to the bq34z110 and provide some means of translating the communication between the host and the gas gauge.

  • 0 in reply to Jason Gin
    Prodigy 20 points

    Hi Jason,

    Thank you for your response, very helpful. Would an RF430 be suitable as the MCU?

    Regards,

    Ger

  • 0 in reply to Gerard Bree
    Genius 3970 points

    I'd look for something in the CC430 line, unless you want to communicate with the battery via NFC.