In Progress

LiFePO4 BMS and display

The goal of this project is to monitor, display info, and protect large LiFePO4 battery packs using Linear's LTC6802IG-2 chip. A total of two (2) PCBs will have to be made. A host PCB which will contain an attiny2313 and a radio transmitter, and a client pcb which will contain the LTC6802IG-2. This way multiple client PCB's can be connected to monitor and protect battery packs with large cell counts. The radio transmitter will interface with the EZ430-CHRONOS-433 watch from TI. The watch will display information (pack voltage, minimum cell voltage, amps, amp hours) sent by the LTC6802. One of the temperature inputs from the linear chip will be used to measure amps. One of the pins from the ATTiny2313 will need to be used to shut off a sold state relay connected to the charger. The system must be able to safely protect batteries while connected to a 25A charger.

LTC6802IG-2 <--> ATTiny2313 <--> Cronos 433

Extra details:

You are in charge of making and delivering a tested and working prototype. When complete I would like to have the finished prototype, parts list (from major North American distributers (Mouser, Farnell, Digi-Key) , gerber files, and the source code. Please include the costs of materials, fabrication and shipping in your bid. Only bid if you are interested and will work hard to complete the project on time. Happy bidding.

Skills: Electrical Engineering, Embedded Software, Microcontroller, PCB Layout

See more: lifepo4 bms, lifepo4 bms ltc6802, lifepo4 cell, lifepo4 voltage display, lifepo4 bms display, lifepo4 bms project, farnell ltc6802, lifepo4, prototype making, pcb to gerber, microcontroller prototype, making prototype, making a prototype, goal engineering, gerber engineering, digi key, complete fabrication, chronos pcb, battery bms project ltc6802, bms display

About the Employer:
( 1 review ) River Forest, United States

Project ID: #882171

Awarded to:


I can do it. I have designed the similar program before. I dedicated at microcontroller system for 8+years, Our products include BMS / USB data logger/WLAN data recorder(with GPS module)/CAN bus control system(with wat More

$720 USD in 40 days
(0 Reviews)

7 freelancers are bidding on average $1521 for this job


See details in MB.

$600 USD in 20 days
(12 Reviews)

Dear Sir, Please read Your PMB.

$600 USD in 60 days
(3 Reviews)

See details in Mb.

$580 USD in 15 days
(0 Reviews)

I am electronic engineer with 25 experience and familiar with microcontroller design and manufacturing.

$900 USD in 30 days
(0 Reviews)

pls see pm for details

$750 USD in 60 days
(0 Reviews)

Please see PM.

$6500 USD in 55 days
(0 Reviews)