Biu Introduction; Biu Function Introduction - Deligreen BI51 User Manual

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The core members come from the top battery and BMS manufacturers, which have rich experience. We
combine battery characteristics and BMS operating practice, devote to making battery thinking, create
intelligent security of electric vehicle.

3. BIU Introduction

3.1 BIU function introduction

BIU is the core unit of BMS, which can collect battery information and analyze them to manage. The
function includes: state estimate, current detection, external communication, internal communication,
warning and protection, external control, signal join up, voltage collection. Description as below:
Function
Voltage detection Realize real-time voltage detection through collecting single cell voltage.
Temperature Realize real-time temperature detection through 1~4 temperature sensor in battery
detection pack.
Based on SOC algorithm and calibration compensation strategy, the battery group
SOC estimation
SOC was estimated dynamically.
The charge and discharge current is tested in real time through hall current sensor
Current detection
or diverter.
Communicate with other modules, charging devices, and vehicles of BMS system
Communication
through 3 CAN interfaces.
Upper computer Communicate with Upper computer to display data and download program
connecting through RS485 interface.
Warning and Conduct alarm and protection according to the sampling information and state
protection estimation results through built-in alarm protection control strategy.
System
Check function and state of each unit to ensure system safety
self-check
6relay control interfaces ensure the control signal output to charge, discharge and
Control output
auxiliary equipment
Digital input 4 digital input interfaces can receive external digital control signal.
Analog input 3 analog input interfaces can receive external analog control signal.
Test the total voltage and the positive&negative leakage current of the battery
Insulation detection
pack.
BI51 Type User Manual V2.4
Table 4 BIU function
Description
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