Remote IOS Monitoring System

Transcription

1 Remote IOS Monitoring System Design Team 08 Pierre Hall, Project Leader, EE Benjamin Kasmin, Hardware Manager, EE Philip Steele, Archivist, EE Yikun Wang, SoBware Manager, CpE Dr. Subramaniya Hariharan

2 Introduction Need There is a need for a convenient and effective method to remotely monitor the charging characteristics and battery health of an electric vehicle that is convenient, cost-effective, and simple to incorporate into an existing vehicle Objective To design and build a system to remotely monitor the battery condition of an electric vehicle via an ios application The design process will consist of writing the application code and integrating it with custom hardware that connects to the vehicle. 2

3 Level 3 Hardware Block Diagram 3

4 Vehicle Integration Schematic 4

5 RIOS Internal Hardware Schematic 5

6 Inside of Black Box Regulator Circuit Arduino Board Voltage Divider Circuit Current Sensor Current Sensor DC/DC Converter 6

7 Voltage Measurement Validation Design Requirement #2 SaUsfied: The monitoring device shall accurately approximate bazery voltage and current with an error of ±1% 7

8 Current Measurement Validation Accuracy = 99% Design Requirement #2 SaUsfied: The monitoring device shall accurately approximate bazery voltage and current with an error of ±1% 8

9 Temperature Measurement Validation Accuracy = 99.7% Design Requirement #3 SaUsfied: The monitoring device shall closely monitor the peak temperature of the bazery pack with an error of ± 1 deg Celsius 9

10 Velocity Measurement Validation Design Requirement #8 Support: The monitoring device applicauon should be intuiuve 10

11 Black Box Volume 11cm x 19cm x 6cm=1254 cm 3 =1.254 liter 6cm Design Requirement #9 SaUsfied: The monitoring device shall be no greater than 3.5 liters in volume 11

12 Level 1 Software Block Diagram Serial Data from Microprocessor Serial Module Internal Data Transfer User Interface - Discharging Data from Database of Cloud Server Server Module Internal Data Transfer App Module User Interface - Charging Module Inputs Outputs Functionality Designers Microprocessor,Parsing,Module Serial,Data,from,Processor Internal,Data,Stream,(Real:Time) Receives,and,then,parses,data Yikun,Wang 12

13 Discharging mode 0.2 A 56.8 V 79 F 0 mph 0.2x56.8x79x0x99n Design Requirement #6 SaUsfied: Displays real- Ume data when connected locally 13

14 State of Charge calculation Initial value of SOC: 100% Charging: CBC=CBC+0.2*ChargingCurrent Discharging: SOC = CBC=CBC-0.2*BatteryCurrent CurrentBatteryCapacity TotalBatteryCapacity CBC s unit is in ampere-seconds (0.2s is the refresh rate of the microprocessor) Design Requirement #11 SaUsfied: Monitoring device shall calculate and display the host system s state of charge 14

15 Charging mode 3.4x56.47x x x54.53x x88.6 TCP Server Database of Cloud Server 15

16 Charging mode TCP server receives data from cellular shield of microprocessor and sends them into database of cloud server 16

17 Charging mode Cloud server receives data from TCP server and stores them in a database Design Requirement #7 SaUsfied: Monitoring device applicauon shall refresh sensor data every 5 minutes or unul requested by the user 17

18 Charging mode 3.4x56.47x x87.5 TCP Server Cloud Server EsUmated Charging Ume = (1- SOC) * BaZery Capacity Charging Current 18

19 Design Requirements 1 - The monitoring device shall be constructed in such a way that it will not jeopardize the safety of the host system 5 The monitoring device must be able to function from the operating power of the host system

20 Design Requirements (Continued) 8 - The monitoring device application should be intuitive 12 - The monitoring device application must allow the user to define different battery specifications 6 - When connected locally (in the host system s discharging state), the monitoring device application should display real-time data 10 - The monitoring device application shall display the battery pack voltage, temperature, and the current drawn by the host system 11 - The monitoring device application shall calculate and display the host system s state of charge 13 - The monitoring device application shall define the estimated remaining distance left of the host system

21 Design Requirements (Continued) 4 - The monitoring device shall supply 5V max and 1A max for ios devices 7 - When connected wirelessly (in the host system s charging state), the monitoring device application shall refresh sensor data every 5 minutes or until requested by the user

22 Conclusion Ques%ons? 22