A daisy-chain SPI interface in a battery voltage monitoring IC for electric vehicles

Author

Xiaofei Wang ; Hong Zhang ; Long Zhang ; Jianrong Zhang ; Yue Hao

Author_Institution

Sch. of Microelectron., Xidian Univ., Xi´an, China

fYear

2014

fDate

28-31 Oct. 2014

Firstpage

1

Lastpage

3

Abstract

This paper presents a current-mode Serial Peripheral Interface (SPI) in a battery voltage monitoring (BVM) IC for electric vehicles (EVs). In the BVM system, multiple cascaded BVM ICs are required to communicate with the MCU, which places big challenges to the design of the bus interface circuits. A current-mode SPI interface of the BVM IC is presented in this paper to form a daisy-chain bus configuration between the cascaded BVM ICs and the MCU, which can avoid the issues of isolated communication, and reduce the required I/O ports of the MCU extensively. The BVM IC is fabricated in a 0.5?m BCD process. Measurement results show that the presented SPI interface achieves a date rate up to 1Mbps, while consumes 3mA in the operation mode.

Keywords

battery management systems; battery powered vehicles; integrated circuits; peripheral interfaces; BCD process; EV; I-O ports; MCU; SPI; battery voltage monitoring IC; current 3 mA; current-mode serial peripheral interface; daisy-chain SPI interface; electric vehicles; multiple cascaded BVM IC; size 0.5 mum; Batteries; Current measurement; Generators; Integrated circuits; Shift registers; Silicon; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated Circuit Technology (ICSICT), 2014 12th IEEE International Conference on

Conference_Location

Guilin

Print_ISBN

978-1-4799-3296-2

Type

conf

DOI

10.1109/ICSICT.2014.7021462

Filename

7021462