• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Need circuit help? Post them in the comments! I've answered over 50,000!

Blog | Categories | About | Contact | Calculators-online
You are here: Home / Solar Controller Circuits / Designing a Powerful 48V 3KW Electric Vehicle

Designing a Powerful 48V 3KW Electric Vehicle

Last Updated on March 26, 2022 by Swagatam 15 Comments

In this post I have explained a few important parameters related to the making of  a 48V 3KW electric vehicle using solar panel, including a full fledged circuit diagram for the same. The idea was requested by Mr. Sreejith.

Table of Contents
  • Circuit Objectives and Requirements
  • 48V 3kW Electric Vehicle Design

Circuit Objectives and Requirements

I am Sreejith Rajan a b.tech student doing a project on electric vehicle as the course project. In my project total load the electric motor has to drive is taken as 900kg including passengers.

So for that a 48V 3kW bldc motor is chosen and the total load current requirement for 5 hours of operation is 400Ah. I have some questions which are as shown below:

1) Does four 48V 100Ah Li battery connected in parallel meet requirement? Is there any other alternative methods? (to reduce the cost and meet this requirements)(How should I select the batteries?)

2) The batteries should be charged by both solar and grid charging. I have got a circuit (Arduino controlled) for charging 12V battery using solar only.

What changes should be made to that circuit for charging 48V batteries?

3) How to add a rectifier circuit with this solar charging circuit so that I can charge the battery using grid power also. (230V AC supply)

4) Is making both circuit in one charge controller possible?

48V 3kW Electric Vehicle Design

1) A 3kW motor could draw as high as 3000/48 = 62 amps at full load. Therefore to run the motor continuously at this rate would require a battery capable of supplying around 60 amps continuosly for at least 5 hours. Which implies that the battery would need to be rated at approximately 60 x 5 = 300AH if it's a Li-ion battery.

In case a Lead acid battery is employed, the rating would need to be much higher at around 60 x 5 x 10 = 3000AH, because a lead acid battery is ideally recommended to be discharged at 1/10th of its AH rating.

Thus if a Li-ion Battery is used for the purpose, 4 fully charged batteries rated at 100AH each in parallel would be sufficient and quite capable of doing the job efficiently.

2) A 12V charger cannot be used for charging a 48V battery, and a 12V solar panel is neither recommended for the application.

The correct method would be to use a 60V solar panel for charging a 48V battery, rated at minimum 30 amps, and same may be employed for the grid based charger specs.

3) A simple 50 amp diode connected with the positives of the two charger counterparts would be enough to isolate the two sources from each other yet charge the battery in tandem with a common positive from their cathodes.

4) Yes it is possible, the solar panel could be exploited thoroughly while the vehicle is ued in open sunshine, this would enable a slow discharge for the battery and also allow quick charging while the vehicle is idle and not operational.

The complete circuit diagram for the proposed 48V 3kW solar electric vehicle can be witnessed in the following diagram:

warning message: electricity is dangerous, proceed with caution

The details of the various pinout functions of the above design can be learned from the following pdf link as presented by TEXAS INSTRUMENTS

https://www.ti.com/lit/ds/symlink/drv8307.pdf?ts=1634813955931

You'll also like:

  • 1.  How to Calculate Solar Panel, Inverter, Battery Parameters
  • 2.  9 Simple Solar Battery Charger Circuits
  • 3.  Make Your Own Rapid Sea Water Desalination Plant at Home
  • 4.  Zero Drop LDO Solar Charger Circuit
  • 5.  Easiest Single Axis Solar Tracker System
  • 6.  Solar Water Heater Circuit with Battery Charger

Filed Under: Solar Controller Circuits Tagged With: 3KW, 48V, Designing, Electric, Powerful, Vehicle

About Swagatam

I am an electronics engineer and doing practical hands-on work from more than 15 years now. Building real circuits, testing them and also making PCB layouts by myself. I really love doing all these things like inventing something new, designing electronics and also helping other people like hobby guys who want to make their own cool circuits at home.

And that is the main reason why I started this website homemade-circuits.com, to share different types of circuit ideas..

If you are having any kind of doubt or question related to circuits then just write down your question in the comment box below, I am like always checking, so I guarantee I will reply you for sure!

Previous Post: « Automatic Food Warmer Lamp for Hotels
Next Post: Greatest Myths about LED Lighting »
Subscribe
Notify of
guest


guest
15 Comments
Inline Feedbacks
View all comments

Primary Sidebar

circuit simulator image

Subscribe to get New Circuits in your Email

Categories

  • Arduino Projects (90)
  • Audio and Amplifier Projects (132)
  • Automation Projects (17)
  • Automobile Electronics (101)
  • Battery Charger Circuits (83)
  • Datasheets and Components (106)
  • Electronics Theory (143)
  • Free Energy (37)
  • Games and Sports Projects (11)
  • Grid and 3-Phase (19)
  • Health related Projects (25)
  • Home Electrical Circuits (12)
  • Indicator Circuits (15)
  • Inverter Circuits (89)
  • Lamps and Lights (142)
  • Meters and Testers (71)
  • Mini Projects (46)
  • Motor Controller (64)
  • Oscillator Circuits (28)
  • Pets and Pests (15)
  • Power Supply Circuits (108)
  • Remote Control Circuits (50)
  • Security and Alarm (64)
  • Sensors and Detectors (103)
  • Solar Controller Circuits (59)
  • Temperature Controllers (42)
  • Timer and Delay Relay (49)
  • Transmitter Circuits (29)
  • Voltage Control and Protection (40)
  • Water Controller (36)

Other Links

  • Privacy Policy
  • Cookie Policy
  • Disclaimer
  • Copyright
  • Videos
  • Sitemap

People also Search

555 Circuits | 741 Circuits | LM324 Circuits | LM338 Circuits | 4017 Circuits | Ultrasonic Projects | SMPS Projects | Christmas Projects | MOSFETs | Radio Circuits | Laser Circuits | PIR Projects |

Social Profiles

  • Twitter
  • YouTube
  • Instagram
  • Pinterest
  • My Facebook-Page
  • Quora
  • Stack Exchange
  • Linkedin
  • Recent Comments

    • Swagatam on Understanding Capacitor Codes and Markings
    • Swagatam on Mains High Low Voltage Protection Circuit with Delay Monitor
    • Swagatam on 3 Phase Induction Motor Speed Controller Circuit
    • Swagatam on Smart Bathroom Exhaust Fan Controller Circuit with Sensors
    • James Williams on 3 Phase Induction Motor Speed Controller Circuit

    © 2025 · Swagatam Innovations