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BQ40Z60EVM-578: Battery charge does not start

Part Number: BQ40Z60EVM-578
Other Parts Discussed in Thread: BQ40Z60, BQSTUDIO

Dear Sirs,

I'm Carlos Sánchez, HW developer of Celestica Spain.

We are developing a product using the BQ40z60 BMS. To evaluate the BMS, We have bought the BQ40z60-578 and the EV2300 and downaloaded the BQStudio.

We have communications with the BQ40z60, so ok.

We can toggle MOSFETs and  toggle LEDs. But we can't start battery charge.

The battery is and 4S1P Li-on of 2400mAh, connected in the 4P.1N terminals, and a 24V power supply to the VAC-PGND inputs. The system is able to measure battery charge as shown later.

We have checked that ACFET , DSG, CHG FET and IT are enabled. But charger does not beging. Here I post and screen shot and upload our setup. Any ideas? Or may be the part is defective?

Thank you a lot in advance.

Kind Regards,

          Carlos

  • When you enable the charger the ACFET should turn on. In your case I'm seeing ACLW set and your adapter voltage is only 6650mV. This is why your evm is not charging. Please check the AC adapter is connected correctly.