Design of a Passive Balancing Battery Acquisition Device Chang'an University

Format:

Book

Conference/Event

Author/Creator:

Ge, Renzhou, author.

Contributor:

Duan, Chendong

Conference Name:

SAE 2024 Vehicle Powertrain Diversification Technology Forum (2024-12-06 : Xi'An, China)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2025

Summary:

A power battery parameter acquisition device was designed and developed with STM32 as the core, featuring the functions of a battery management system (BMS) to ensure the safety and stability of the battery pack during operation. The device includes functions such as battery charge and discharge management, battery safety protection, and battery status monitoring, enabling real-time monitoring of cell parameters. The hardware design covers the power circuit, charge and discharge cycle circuit, battery acquisition circuit, communication module circuit, and single-cell balancing circuit. The software part completes the design and development of each functional module. This paper addresses issues in battery management systems, such as low accuracy in battery parameter acquisition, inconsistencies between individual cells, and weak BMS balancing capabilities. The developed acquisition device can collect parameters for 15 series-connected power batteries, and conduct sampling tests of cell voltage, current, and temperature, as well as balancing tests between cells. The maximum voltage test error does not exceed 0.257%, the maximum current error does not exceed 2.9%, and the maximum temperature error does not exceed 2.7%. The balancing test results show that the voltage difference between individual cells is controlled within 50 mV

Notes:

Vendor supplied data

Publisher Number:

2025-01-7014

Access Restriction:

Restricted for use by site license