Search found 25 matches

by matterrr
Sep 22 2013 1:07am
Forum: Battery Technology
Topic: Are you using fuse in battery harness? What type?
Replies: 21
Views: 2667

Re: Are you using fuse in battery harness? What type?

I've had success with these parts: Fuse holder http://www.digikey.com/product-detail/en/178.6152.0001/F5194-ND/2515821 Fuse http://www.digikey.com/product-detail/en/166.7000.5302/F5168-ND/2515905 Most automotive fuses you find will be rated for 32 volts. When the fuse blows, there could be arcing ac...
by matterrr
Sep 18 2013 10:56am
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)

I used the tutorial found here: http://adamfeuer.com/notes/2013/08/06/building-an-orone-mini-part-2-solder-paste-stencils-using-gerber2graphtec/ I used the settings below with two passes, and a blade setting of 2: --speed 1,1 --force 8,15 The reason it is so precise is because the script separates t...
by matterrr
Sep 17 2013 4:39pm
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)

I shrunk the cream layer by 2 mil, so the openings are slightly smaller than the pads.
by matterrr
Sep 17 2013 12:31am
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino BMS Shield using TI BQ76PL536A (Update 9/3)

Thanks! I finished the solder stencil and I think it turned out well: http://i.imgur.com/eknbwLV.jpg I used a Silhouette Portrait craft cutter, which I got for $80 on Craigslist, and a custom script I found online - it converts paste gerbers to special cut files. All you need is a few mylar overhead...
by matterrr
Sep 16 2013 10:05pm
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino BMS Shield using TI BQ76PL536A (Update 9/3)

Hey everyone,

Just got the PCBs back from OSH Park and they look great. Here are some pictures:

Image

Image

http://imgur.com/a/TdqGv#6KqZs40

Tonight I will be ordering the parts I need and trying to make a solder stencil. Wish me luck!
by matterrr
Sep 10 2013 4:44pm
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino BMS Shield using TI BQ76PL536A (Update 9/3)

I haven't gotten the boards back yet - they estimated that they will be shipped September 15th. I haven't placed the balance resistors - they wouldn't fit on the Uno board, but it's a possibility for the future Mega board. In the meantime, I have ordered some equipment to build these, and I'm workin...
by matterrr
Sep 03 2013 2:47am
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino BMS Shield using TI BQ76PL536A (Update 8/30)

Posted an update on the first page. Just submitted the prototype board to Osh Park, and they might be built on September 5.

Here is a preview:

Image
Image

http://imgur.com/a/GaafQ#BHyFR0V
by matterrr
Aug 31 2013 12:59am
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino BMS Shield using TI BQ76PL536A (Update 8/30)

Hey all,

Posted an update on the front page, and reorganized the information in the first post. The PCB should be done pretty soon.

I am trying to gauge interest in the board, so let me know in the comments or via PM if you will want one when they're finished.
by matterrr
Aug 20 2013 11:22am
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino Mega BMS Shield using TI BQ76PL536A (Update 8/9)

Update for 8/20: Spent the last week routing the new board, the traces are a lot tighter with the new components and smaller board size. The board is about 90% routed, so I still think this will be possible. I am moving the EPROM programming functions to a separate small board so I can reprogram chi...
by matterrr
Aug 09 2013 11:15am
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino Mega BMS Shield using TI BQ76PL536A (Update 3/27

Just posted an update on the first page. Some of the features that might have to be left off: - You can choose the CS pin used on the board (for example, set it to pin 6, 7, or 8) - Ability to leave board plugged into batteries while not in use I am actively looking for feature suggestions so please...
by matterrr
Aug 01 2013 6:36pm
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino Mega BMS Shield using TI BQ76PL536A (Update 3/27

Hi everyone, I just want to point out that I am still working on my own board utilizing the BQ76PL536A and this thread is to discuss this board. I am not collaborating on hardware with dmwahl and mwkeefer, because I have a slightly different vision for my board, but we have shared software. I think ...
by matterrr
Jun 01 2013 6:07am
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino Mega BMS Shield using TI BQ76PL536A (Update 3/27

Glad to see progress has been made in your project. Unfortunately progress on my end will be slow because I'm moving within a month and starting a new job. I don't have the ability to work on hardware right now, but if anyone needs coding advice just let me know. I posted my code in dmwahls thread a...
by matterrr
Apr 28 2013 10:26pm
Forum: Battery Technology
Topic: 3-192S Arduino BMS (using BQ76PL536A)
Replies: 79
Views: 24568

Re: BQ76PL536A Arduino Shield

The chip select pin I assigned on board was being used for the USB host chip to communicate with Android. I recruited that signal to a different pin with sky wires and it worked fine. I would just double check whether there are any signals assigned in the Arduino Uno already.
by matterrr
Apr 27 2013 11:08pm
Forum: Battery Technology
Topic: 3-192S Arduino BMS (using BQ76PL536A)
Replies: 79
Views: 24568

Re: BQ76PL536A Arduino Shield

If anyone wants to take a look, I attached a program that includes a few useful functions. I can edit it a bit later, but it has the basics, including the CRC check that you need to write bytes to registers on the BQ76PL536A. https://docs.google.com/file/d/0B8XAfMAgWNMBSXA4NFdHeW0xX0U/edit?usp=shari...
by matterrr
Apr 27 2013 6:45pm
Forum: Battery Technology
Topic: 3-192S Arduino BMS (using BQ76PL536A)
Replies: 79
Views: 24568

Re: BQ76PL536A Arduino Shield

Hey all,

I am working on a similar project, except for the Arduino Mega board. I produced boards and code that work. If you have any questions about code, I have a working implementation that I can share. I haven't converted it to a library, but that might be a good next step.
by matterrr
Mar 27 2013 12:54pm
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino Mega BMS Shield using TI BQ76PL536A (Update 3/4)

Quick question for you on this project. You are using it just to monitor the cells, correct? I ask cause I started designing mine using the ltc6803, which is the same type IC. I want to make mine a full BMS that can also cut the pack off if a cell gets too low, like current bms's do. You dont have ...
by matterrr
Mar 06 2013 2:44pm
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino Mega BMS Shield using TI BQ76PL536A (Update 3/4)

My plan right now is to write an Arduino library to interface with the device. That way, you can use it and adapt to your own board.
by matterrr
Mar 04 2013 1:39am
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino Mega BMS Shield using TI BQ76PL536A! (Updated)

I'm curious, why are you designing the shield for the Mega? The communication with the Arduino is over SPI anyway, so it's not like you need all the pins. For the larger amounts of memory perhaps? This is for a university project. We are using the mega ADK to communicate with a Google Nexus 7. It i...
by matterrr
Mar 02 2013 3:56pm
Forum: E-Vehicles General Discussion
Topic: Organic Transit Elf (velo) on kickstarter
Replies: 43
Views: 11756

Re: Organic Transit Elf (velo) on kickstarter

I have met some of the people working in this shop, seems like an awesome project. I had no idea they raised all that money on Kickstarter. They have some vehicles on display sometimes and they look great.
by matterrr
Feb 26 2013 4:24pm
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino Mega BMS Shield using TI BQ76PL536A! (Updated)

Since I'm only using this chip for cell monitoring, right now I don't think I will be soldering the tab... I will in future versions if I get a solder paste stencil. I have a friend who is a bit more experienced with surface mount, so he will be doing the QFN chips. I will be attempting the rest. I'...
by matterrr
Feb 25 2013 9:23pm
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino Mega Cell Monitor Shield using TI BQ76PL536A!

grindz145 wrote:the 536A is an awesome part. Do use the balance function though! Otherwise it defeats the purpose!
Haha yeah, I left the balance function out because this BMS will only be used when the cells are discharging. I already have a Hyperion charger, and they did a far better job than I ever could.
by matterrr
Jan 22 2013 9:40am
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Re: Arduino Mega Cell Monitor Shield using TI BQ76PL536A!

My only recommendation is that you maybe go up to 24s max. It looks like you might have room to squeeze two more of the BQ chips on the board (lots of pins (64) on that part for only 6 cells). Nice work. I'm definitely considering adding one more BQ in the future. For my vehicle, the maximum allowe...
by matterrr
Jan 21 2013 12:37pm
Forum: Battery Technology
Topic: Arduino BMS Shield using TI BQ76PL536A (Update 9/16)
Replies: 89
Views: 20612

Arduino BMS Shield using TI BQ76PL536A (Update 9/16)

Hi everyone, Just wanted to share a project I'm working on to see if anyone has attempted anything similar or is just interested. I am building a performance / battery monitor for a small electric vehicle and I'm using the Arduino Mega ADK R3 to interface between the vehicle and the sensors / batter...
by matterrr
Oct 03 2012 12:33am
Forum: E-Bike Technical
Topic: Solar panel for boost while coasting?
Replies: 21
Views: 1836

Re: Solar panel for boost while coasting?

Thanks for the thoughts, everyone. These are the things I was hoping to learn. A few more details, if it helps: - the vehicle will already have a body shell and I would most likely be adding individual cells that conform to the body and wiring them together, rather than using a large flat panel. So ...
by matterrr
Oct 02 2012 8:33pm
Forum: E-Bike Technical
Topic: Solar panel for boost while coasting?
Replies: 21
Views: 1836

Solar panel for boost while coasting?

Just wanted to begin by saying that Endless Sphere has been an awesome resource for me and I have avoided posting questions to this point because you guys have answered all of them many times over. I thought some people might find this interesting. For some background: I have built a working electri...