See document: A01_How to connect hardware and configure software of BQ40Z80RSMT
5852.A01B_How to connect hardware and configure software of BQ40Z80RSMT.docx
Here is the text
How to connect hardware and configure software of BQ40Z80RSMT
1 circuit board
1.1: evaluation board bq40z80evm-020, bms020b, hereinafter referred to as EVM
1.2: circuit board BP, hereinafter referred to as BP
U3 model in the figure is bq40z80rsmt
2 normal use
2.1: how to connect EVM and BP normally, so that BP can be used normally, i.e. charge and discharge