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by GregsGarage
Wed Feb 20, 2013 7:11 pm
Forum: BMS thread
Topic: Old BMS Hardware Thread
Replies: 613
Views: 281606

Re: Old BMS Hardware Thread

Look at the master bus with the logic analyzer. Compare the data being sent on the master to what you are getting on the display. Slave bus can be checked by sending command 7.
by GregsGarage
Wed Feb 20, 2013 6:00 pm
Forum: BMS thread
Topic: Old BMS Hardware Thread
Replies: 613
Views: 281606

Re: Old BMS Hardware Thread

Just think of a logic analyzer as a simple scope with no voltage scale to adjust and the time scale is adjusted by sample rate. It will decode the bits and give you a display of the data and also allow you to see the timings between signals being sent. Just watch when connecting to slave busses, all...
by GregsGarage
Wed Feb 20, 2013 5:56 pm
Forum: All things battery related
Topic: Help Needed with Mobility Scooter Batteries
Replies: 13
Views: 34518

Re: Help Needed with Mobility Scooter Batteries

That all sounds reasonable, I think the gel would be a better choice. Let us know how you get on.
by GregsGarage
Tue Feb 12, 2013 11:16 pm
Forum: BMS thread
Topic: LTC6802 based 12 cell slave.
Replies: 75
Views: 82332

Re: LTC6802 based 12 cell slave.

Not a bad idea, but isnt there some kind of round plug that could be used instead? Just because its much easier to drill a hole into a battery box. I'm open to suggestions, but haven't found anything I like. But thinking outside of the box I am leaning towards using a case big enough to house the p...
by GregsGarage
Tue Feb 12, 2013 5:48 pm
Forum: All things battery related
Topic: EV Fires
Replies: 7
Views: 6493

Re: EV Fires

Any battery chemistry, including lead acid, can be involved in an EV fire. I wouldn't worry about what type of chemistry it was, instead try and understand all possible scenarios that could have occurred and then work out how to prevent those from happening to you. Nearly all EV fires are during una...
by GregsGarage
Sat Feb 09, 2013 1:27 pm
Forum: BMS thread
Topic: Lithium Battery Monitor 48 cell
Replies: 57
Views: 66125

Re: Lithium Battery Monitor 48 cell

I just "finished" the car. Failed MOT. Why? Because the power steering was "inadequately" modified. I bippassed the rack to work as a manual, how serious that is :twisted: My car is fully covered underneath for aerodynamics. Keeps the MOT man from looking too closely. :twisted:
by GregsGarage
Wed Feb 06, 2013 10:36 pm
Forum: All things battery related
Topic: Help Needed with Mobility Scooter Batteries
Replies: 13
Views: 34518

Re: Help Needed with Mobility Scooter Batteries

Haze USA site has lots more info on it. The HAZE EV & Solar Cyclic Charging.pdf can be found here; http://www.hazebatteryusa.com/s.nl/sc.15/.f From the document Soft Start – Following a deep discharge applying the full current immediately may damage the battery and cause overheating, the applica...
by GregsGarage
Tue Feb 05, 2013 12:28 pm
Forum: All things battery related
Topic: Help Needed with Mobility Scooter Batteries
Replies: 13
Views: 34518

Re: Help Needed with Mobility Scooter Batteries

I have tried to measure the current but think I have failed miserably. I only have a cheap multimeter with a 10 Amp range. On this range the scooter seems to use about 14 Amps on the flat and 17 Amps on the hill. Not sure how reliable this is given its a 10 Amp meter. I wouldn't trust those reading...
by GregsGarage
Mon Feb 04, 2013 12:16 am
Forum: BMS thread
Topic: LTC6802 based 12 cell slave.
Replies: 75
Views: 82332

Re: LTC6802 based 12 cell slave.

I'm back! :shock: Finally got some time to tackle the software problem that I had. I was having trouble figuring out how to get pbp to convert the raw cell data into usable readings. I was trying to use the same method that I used with the MM, but it wasn't working due to the differences in the way ...
by GregsGarage
Mon Jan 28, 2013 10:55 pm
Forum: All things battery related
Topic: Help Needed with Mobility Scooter Batteries
Replies: 13
Views: 34518

Re: Help Needed with Mobility Scooter Batteries

I can also work out the slope, which will be easier. Current estimate is 200' in about 1500' but that is just a guess. I will get a more accurate reading shortly OS map should help, should be able to view something on the internet. Good point about connections, also anything getting warm after a cl...

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