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circuit design

I want to charge 3 18650 lithium ion cells in parallel from a usb port. I want to power my project from either the internal batteries or an external power bank. I want to be able to charge the batteries while at the same time powering my project. I would like to track charge level, current draw and time remaining. The project will average 600 mA with surges up to 4A. The circuit shall protect from overcharge, overdischarge, and thermal protection.

Skills: Electrical Engineering, Electronics, Circuit Design, Engineering, PCB Layout

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About the Employer:
( 0 reviews ) Vancouver, Canada

Project ID: #20439821

26 freelancers are bidding on average $174 for this job

DreamCha

Thanks for sharing your project. As I'm a Senior Embedded System engineer, I have rich experiences in many embedded systems development and home automation programming over 8+ years. Especially, I had designed man More

$300 CAD in 7 days
(30 Reviews)
8.5
mechatronicsengr

Hi, I hope you are doing well. I have extensive experience in embedded system design and development. I have worked on several battery charging system design and development. I have understood your requirements and More

$300 CAD in 7 days
(51 Reviews)
6.5
dalong243020

I am a Senior Electronics and Embedded Engineer with the areas of expertise in Home Automation System and Embedded System, product prototyping, Schematic & PCB design and firmware development for systems. As I'm a Mas More

$250 CAD in 7 days
(1 Review)
4.8
JMITSolution

I have 8+ years of experience in the design of digital and analog design. I have a rich experience of design and simulation about RF and electronic circuit using Cadence , Altium, ADS, HFSS and so on. Best Regards

$250 CAD in 7 days
(4 Reviews)
4.3
intellisenseIN

Hi there, I came across with your requirements and we can design a circuit as per your requirements given in the job description. We are a team in Embedded hardware & software development. Please come for the intervie More

$200 CAD in 7 days
(2 Reviews)
3.9
raimilson

Hi, this is Carlos, out of Winnipeg! I already a circuit for another product that has almost the same specs you are looking for, I would just need to understand these 4A surges you are talking about. What are you con More

$600 CAD in 7 days
(1 Review)
3.1
moimran50

dear sir as read your problem i will help you to charge internally and externally as you want with smart charge controller ic mcp7381

$250 CAD in 7 days
(1 Review)
2.2
Starkindustries

I can complete this job. come to chat to discuss more. I want to charge 3 18650 lithium ion cells in parallel from a usb port. I want to power my project from either the internal batteries or an external power bank. I More

$100 CAD in 2 days
(2 Reviews)
1.6
minienergy

General message: Dear Sir, Greetings from Turkey. I hope you are good. Let me introduce me. I'm Electronics Enginner who have 19 year experience. My experience is related to power electronics, hardware design, ana More

$100 CAD in 3 days
(2 Reviews)
2.9
hassanmohyudine

hi i am a design engineer with experience in designing custom projects. I can design this project for you , please contact for further details

$83 CAD in 7 days
(4 Reviews)
1.6
Panggumsok

Hi, I am working on embedded system design and realization. So that I've made some types of power supply. Typically I made 12V/3A switching power. I believe I can do it. I'm very interested in your project and my resu More

$100 CAD in 7 days
(1 Review)
1.4
WDTec

We are a team of engineer experienced in electronics, circuit design, PCB design, micro-controller programming, Arduino and wireless protocol. We have designed and developed circuits and products in the field of weara More

$250 CAD in 7 days
(1 Review)
1.1
terrymoreau

I'm in Vancouver! U-TurnSystems dot calm. I'm in Vancouver! U-TurnSystems dot calm. I'm in Vancouver! U-TurnSystems dot calm.

$30 CAD in 1 day
(0 Reviews)
0.0
MatthewDeGieter

Hello, as an experienced electrical engineer with more than 8 years of experience, I am very confident with your project. I developed lots of electrical devices such as loT devices, wearable devices. power supply devic More

$55 CAD in 7 days
(0 Reviews)
0.0
VlaDimitris

I already have worked on a system like this for a personal project for my university's final project. For the amount of 110CAD i can provide you schematic, working principal, PCB and what parts to get.

$110 CAD in 5 days
(0 Reviews)
0.0
SkyPhy

Hi, we have design a multi-charger systems that similar to your requirements. SkyPhy Lab is an open Interdisciplinary mutual-cooperation Integrated-products-development platform & XaaS provider. And is concentrated on More

$140 CAD in 7 days
(0 Reviews)
0.0
techfinitysols5

Dear Prospect Hiring Manager. Thank you for giving me a chance to bid on your project. i am a serious bidder here and i have already worked on a similar project before and can deliver as u have mentioned "I can do th More

$140 CAD in 7 days
(0 Reviews)
0.0
sandeepsinghjagd

i use Lipo cell in many robots and charging ,discharging , overcurrent ,shot circuit protection, EMI protection ,thermal protection, level indication and much more.i can do it easily.

$140 CAD in 7 days
(0 Reviews)
0.0
Rakib1209045

I have good knowledge about Li-ion battery charging with protection. if you give me the opportunity I will responsibly do it for you.

$200 CAD in 14 days
(0 Reviews)
0.0
developersperhr

I am ELECTRICAL & ELECTRONIC ENGINEER with 5 year experience in field I have successfully completed all works with 5 star ratings I can work in any software Proteus or EagleCAD ,NI Multisim ,LTspice , Pspice, Diptrace More

$140 CAD in 7 days
(0 Reviews)
0.0