BQ40Z80: TI solution suggestion

Jimmy Lai

Part Number: BQ40Z80
Other Parts Discussed in Thread: BQ40Z50, BQ28Z610

Dear Team,

Do we have suitable solution can meet customer's spec?

1. 4 strings of 21700 battery cells
2. Battery voltage, current, temperature monitoring
3. Battery capacity prediction
4. Battery cycling
5. Battery Health Prediction
6. Battery protection
7. I2c report mechanism
8. Cell Balancing

Many Thanks,

Jimmy

over 3 years ago

0 Jose Couso over 3 years ago

TI__Mastermind 27321 points

Hello Jimmy,

The bq40z50 will do the job nicely, except it is SMBus communication interface.

There's this app note for SMBus vs I2C compatibilty: https://www.ti.com/lit/an/sloa132/sloa132.pdf?ts=1662135033730&ref_url=https%253A%252F%252Fwww.google.com%252F

Jimmy Lai said:
4 strings of 21700 battery cells

Do you mean in series or parallel?

An alternative will be to use BQ28Z610 (this is a 2S pack), but can be scaled to 4S. We can provide more information if needed.

Regards,
Jose Couso

Power management

Power management forum

BQ40Z80: TI solution suggestion