BQ35100EVM-795: WriteMACReadBlock communication error

Udarshan

Prodigy 50 points

Part Number: BQ35100EVM-795
Other Parts Discussed in Thread: EV2400

Hi,

I connected a LiSOCl2 battery along with 1k load to BQ35100EVM board. The board running the default firmware.

1. Dashboard only shows voltage but current always zero (I manually checked load is consuming 3.6mA)

2. Whenever I try send NEW_BATTERY command it shows a communications error

What will be the root cause?

over 4 years ago

0 Wyatt Keller over 4 years ago

TI__Guru** 105590 points

Hello Udarshan,

I would double check the connections in the EVM user's guide, the gauge should read the current if it's connected correctly.

Are you using the EV2400 for testing?

Sincerely,

Wyatt Keller

0 Udarshan over 4 years ago in reply to Wyatt Keller

Prodigy 50 points

Hi Wyatt Keller,

Yes, I connected to EV2400 and I can query Device Number, FW_Version, Chem_ID etc. But when query NEW_BATTERY it's throwing an error.

Battery voltage is always available but current is always zero. (Please see the attached screenshot)

Thank You

0 Wyatt Keller over 4 years ago in reply to Udarshan

TI__Guru** 105590 points

Hello Udarshan,

I believe the command is still sent successfully, I was able to test on my EVM and it would clear the Accumulated Capacity and still show the error. I don't think it interferes with the operation.

Sincerely,

Wyatt Keller

0 Udarshan over 4 years ago in reply to Wyatt Keller

Prodigy 50 points

Hi Wyatt Keller,

Thank you. Then If NEW_BATTERY command executed correctly why Battery gauge still shows 0% and what could be the reason the current is showing zero. I connected a 1k load and tested manually it consumes 3.6mA.

Thank you

Regards,

Udarshan

0 Wyatt Keller over 4 years ago in reply to Udarshan

TI__Guru** 105590 points

Hello Udarshan,

Please follow the steps in the app note: www.ti.com/.../slua904.pdf

I was able to get correct SOH readings even with the MACdata error. NEW_BATTERY did reset the percentage.

Sincerely,

Wyatt Keller

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BQ35100EVM-795: WriteMACReadBlock communication error