The battery management system developed based on Nuvoton MS51...

1. Introduction

1: Develop a battery management system (BMS) program composed of discrete devices based on MS51, which is the link between the battery and the user, mainly to improve the utilization of the battery and prevent the battery from overcharging and overdischarging.

2: LED instructions

• The blue light is on and the system is on

• Flashing indicates that it is in charging state

• When the blue light is off, it enters the standby state, and the machine is turned on when the button is pressed or the external power supply is plugged in



2. Performance parameters

1. System characteristics

• 1T 8051 MCU, operating speed up to 24 MHz

• 5 to 10 high-precision battery voltage measurement

• Discharge current measurement

• Overcharge and overdischarge protection

•       temperature check

• Battery balance

•       Short circuit protection

2. Hardware interface description

2.1 Battery selection and balance: B1-B10 battery cell voltage detection and balance control, PCB package 11PIN P: 1.25MM.

2.2 Battery positive and negative input "BAT+, BAT-"

2.3 Power battery output "PACK+,PACK-"

2.4 External power input interface   

2.5 Battery surface temperature detection circuit

2.6 Software programming interface

Industry Classification: Power Battery

Development platform: Nuvoton

Delivery form: PCBA

Performance parameters: Operating speed: 24 MHz, battery voltage measurement: 5 to 10 cells

Application scenario: BMS battery protection board