BQ76940: BQ76940

GURURAJ TALEWAD

Part Number: BQ76940
Other Parts Discussed in Thread: BQ76930, , TIDA-01093

BQ76930

Hello,

Understand that BQ76940 can support up to 20S battery cell. Please advise if this part is stack-able to support 30S battery cell?

Hope to hear from you soon. Thanks.

over 4 years ago

0 GURURAJ TALEWAD over 4 years ago

Intellectual 445 points

BQ76930

Hello,

Understand that BQ76940 can support up to 15S battery cell. Please advise if this part is stack-able to support 30S battery cell?

Hope to hear from you soon. Thanks

0 David Hien over 4 years ago in reply to GURURAJ TALEWAD

TI__Genius 10830 points

Hi Gurauraj,
You can certainly stack 2 BQ76940 monitors for a 30s battery. You can follow the TIDesign TIDA-01093 , based on BQ76930 (the 10s monitor from the same family of monitors as BQ76940), to help you in your design.

0 GURURAJ TALEWAD over 4 years ago in reply to David Hien

Intellectual 445 points

Hello David,

Do you provide  sample code for "Industrial Battery Management Module for 20S Applications Reference DesignTIDA-01093 "?


Mail ID: gururaj@vaakulab.com

0 David Hien over 4 years ago in reply to GURURAJ TALEWAD

TI__Genius 10830 points

Gururaj,
Yes, you can find the sample code on the page I sent you under "Application Notes".

I2C Communication Sample Code for the bq76940 with CRC Based on the MSP430 (Rev. B)

0 Ansul Tyagi over 4 years ago in reply to David Hien

Intellectual 305 points

Hi David,

I would like build a 96V Li-ion battery using 30s configuration.

In such a configuration, When the battery pack is fully charged the pack voltage will be 109.5V

I would like to make ckt similar to TIDA-01093 with bq76940

Will device bq76940 work at 109.5 volts?

0 WM5295 over 4 years ago in reply to Ansul Tyagi

TI__Guru 54715 points

Hi Ansul,

For 30s configuration 2 BQ76940s would need to be stacked similar to TIDA-01093. The BQ76940 has an abs max limit of 36V per 5 cell group, see the data sheet. In a 30s configuration each BQ76940 would have only 15 cells attached with a voltage less than 109.5V.

Power management

Power management forum

BQ76940: BQ76940