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by GregsGarage
Sat Nov 03, 2018 8:50 pm
Forum: General
Topic: BVS possible closure
Replies: 6
Views: 3156

Re: BVS possible closure

If it's possible to get a backup file of Board index > General chat > All things battery related > BMS thread
That would be very helpful, I have recently started working on my BMS project again and the historical data in that section is useful.

Greg
by GregsGarage
Fri Nov 13, 2015 11:22 pm
Forum: BMS thread
Topic: Old BMS Software Thread
Replies: 600
Views: 227322

Re: Old BMS Software Thread

If you can send command 7 and the slaves light up as they should then you know the slave bus is OK. Even if you don't know how to read schematics or programming this project will he a good start. The source code is a version of basic. If you are considering arduino then you will be learning C progra...
by GregsGarage
Wed Nov 11, 2015 11:46 am
Forum: BMS thread
Topic: Old BMS Software Thread
Replies: 600
Views: 227322

Re: Old BMS Software Thread

I seem to recall the system may not work correctly with just one cell connected, but I could be wrong. You also may need to activate the charge routine in the master to test the slave loads. My own experience so far with lithium cells is they don't require daily balancing which is why my LTC6802 sla...
by GregsGarage
Sun Nov 08, 2015 3:57 pm
Forum: BMS thread
Topic: Old BMS Software Thread
Replies: 600
Views: 227322

Re: Old BMS Software Thread

Those are the relevant diagrams posted by Martin. The 5 buttons shown in the top schematic is the joystick button which connects to the master J9 pins 1 and 6. Once you have the buttons working you can access the menus and set the cell number to 16 or whatever your value is. This value will be saved...
by GregsGarage
Fri Nov 06, 2015 10:19 am
Forum: BMS thread
Topic: 16 Cell Multi Slave Board
Replies: 26
Views: 25814

Re: 16 Cell Multi Slave Board

Anthony, Peter and I designed the master software for use in a electric vehicle. You will need carefully examine the code and make changes so it is suitable for your application as a battery bank for photovoltaic panels. In particular you need to find out what the manufacture of your cells recommend...
by GregsGarage
Thu Nov 05, 2015 7:02 pm
Forum: BMS thread
Topic: 16 Cell Multi Slave Board
Replies: 26
Views: 25814

Re: 16 Cell Multi Slave Board

Here are some basic instructions. The slave bus has 2 wires and sends commands from the master to the slaves in a daisy chain fashion. So on the master you should have 2 terminals for the slave bus, these need to be connected to the 2 terminals on the slave bus in connector. If you have more slaves ...
by GregsGarage
Wed Jun 04, 2014 8:27 am
Forum: All things battery related
Topic: Direct lead battery replacement by LiFePO4
Replies: 1
Views: 5107

Re: Direct lead battery replacement by LiFePO4

It will be because of the voltage ratings used on whatever bms circuitry is built into their 12v batteries. They probably have some ~60 volt rated components so that is what limits you to 4 (12 volt) batteries in series. Lithium cells must never be over or undercharged. Even one occurrence will prob...
by GregsGarage
Mon May 05, 2014 9:16 am
Forum: All things battery related
Topic: how to choose battery, its capacity
Replies: 3
Views: 6579

Re: how to choose battery, its capacity

Basically you will need to know how much fuel you require for the race and what the duration of the race will be. The fuel is measured in watt/hours and ideally your pack will be sized for the amount of Wh or kWh you are going to use. The duration of the race will tell you what the average discharge...
by GregsGarage
Fri Jan 10, 2014 3:15 pm
Forum: All things battery related
Topic: Flow Batteries: The future of high-capacity energy storage?
Replies: 5
Views: 10323

Re: Flow Batteries: The future of high-capacity energy stora

What are people's thoughts on this development in regards to future electric vehicles? Hugely important as long as you don't waste time trying to fit the technology in a EV. Grid storage systems will allow widespread adoption of renewables, being able to store the energy when it is generated and us...
by GregsGarage
Fri Nov 22, 2013 10:18 am
Forum: All things battery related
Topic: discharge battery
Replies: 6
Views: 6988

Re: discharge battery

A bms must monitor individual cell voltages and act when any cell goes to high or low. On ebikes the usual way is to simply disconnect the pack from the charger/controller with mosfets on the bms board. Since you don't want to overload the mosfet they will implement a current monitor circuit that wi...

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