Re: [EVDL] BMS questions

Though, how will this setup works will depend on what kind of failure happens. One possible configuration would be with Big Cable cross connects at one end of modules, and little cross connects between the 12 cells of the module: A) Single Cell Opens - in either module - All pack current com

Re: [EVDL] BMS questions

Well, it depends on how closely matched the packs are. If they are good quality and closely matched, then you don't really need the cell interconnects between the 2 strings to be all that stiff. Consider that most BMS balancing loads are 100ma or less, it's unlikely to have much more than that f

Re: [EVDL] BMS questions

I can get a cable in to do cell taps, but running a bunch of cross-module interconnects that can carry high current is unlikely. I'd need to use something like 16ga interconnects for between module/cells.  Then would I need to cross-connect with big cables at each module pair, as well as cable t

Re: [EVDL] BMS questions

If it's sealed with no cell taps, how can you build a proper BMS? On Sat, Oct 8, 2022 at 8:09 PM John Lussmyer via EV wrote: > Can't do in this case. Each module is a sealed box of 12s. > > On 10/8/2022 5:55 PM, (-Phil-) wrote: > > The best way to do a parallel setup is cell buddy-pairs if poss

Re: [EVDL] BMS questions

Can't do in this case.  Each module is a sealed box of 12s. On 10/8/2022 5:55 PM, (-Phil-) wrote: The best way to do a parallel setup is cell buddy-pairs if possible.  There is no problem doing it this way.   Could also "cheat" with 2 separate strings by tying the cell taps together as stiffly

Re: [EVDL] BMS questions

The best way to do a parallel setup is cell buddy-pairs if possible. There is no problem doing it this way. Could also "cheat" with 2 separate strings by tying the cell taps together as stiffly as practical. On Sat, Oct 8, 2022 at 4:57 PM John Lussmyer via EV wrote: > I've been looking into b

[EVDL] BMS questions

I've been looking into both Thunderstruck and Orion BMS docs. One interesting doc is from Orion - describing the possible issues with parallel strings (which I will have), and some possible mitigation strategies. https://www.orionbms.com/manuals/pdf/parallel_strings.pdf I'm thinking about the o

[EVDL] BMS question

The following inquiry is reposted from the Solectria EV discussion list. I'll forward any responses back to that list. Thanks! > Looks like my CALB cells are getting close to the end of their lives. The > capacities have been changing quite a bit over the past several months. > The car itself i

[EVDL] BMS recommendations

Hi All, I've been lurking in the background for some time now, occasionally responding since my background is that of a mechanic (auto tech) with extensive experience in electrical and fuel injection systems. I "retired" about 15 years back and went to work part time for Maine Organic Farmers a

[EVDL] BMS boards

I've been testing several different versions of the little 18650 BMS boards. I purchased these from Amazon, as I wanted to do some testing ASAP. What you order, may or may not be what you actually receive. So far, the tests are pretty disappointing. Most of the boards that SAY they have Balance

Re: [EVDL] BMS question

I was just looking into this recently. There appear to be two types of cheap BMS systems, ones that just equalize when the batteries near full charge (put a small load, 40-70mv, on cells when they get over 4.1V) and the other type is typically called an "Active Balancer" it runs continuously an

Re: [EVDL] BMS question

For just a few batteries, I'd look at what the Radio Control guys use.    I think they have built in BMS and some are programmable.Being as you are only going to have 4 (for 12 volt trolling), I think you could get a complete solution cheap.    I think they use differentterminology like "4S" for

Re: [EVDL] BMS question

Thanks all for the advise and ideas. I joined the Electricboats list - excellent resource! There is also a PlugBoats website/journal which looks good. I borrowed our electronic load from work and will cycle a few batteries to see what I have. Good to know it may take a few cycles to see where

Re: [EVDL] BMS question

I don't know anything about BMS's but Lithium Iron Phosphate cells can experience capacity fade even if they have good voltage. I had some cells that sat around for a year and a half and showed good voltage but when I cycles them they only had 45Ah out of 100Ah they started with. I thought I ru

Re: [EVDL] BMS question

There are great resources for electric powered sail boats at electricbo...@groups.io https://groups.io/g/electricboats  On Wednesday, October 6, 2021, 07:25:44 PM EDT, steve sawtelle via EV wrote: I guess this may qualify as an old-school question now. About 12 years ago I built an el

[EVDL] BMS question

I guess this may qualify as an old-school question now. About 12 years ago I built an electric motorcycle. I actually had it up and running, but other things got in the way and I am abandoning the project. The rolling chassis will get back it's ICE and I need to find a home for the 7" Jim Hust

Re: [EVDL] BMS cell pairs

Many of the BMS systems out there are using chips designed for Laptop and power tool packs where the BMS disconnects the pack from the load or charger to prevent high/low cell voltage or overcurrent. Due to their low cost, they have been 'beefed up' for high current use that is not really appropria

Re: [EVDL] BMS cell pairs

charger Sent from Mail for Windows 10 From: Lawrence Rhodes via EV Sent: Friday, 22 May 2020 12:26 PM To: ev@lists.evdl.org Cc: Lawrence Rhodes Subject: [EVDL] BMS cell pairs It seems most battery pack builds use one bms per cell row.  That is two or three batteries in parallel using one BMS.  If

[EVDL] BMS cell pairs

It seems most battery pack builds use one bms per cell row.  That is two or three batteries in parallel using one BMS.  If I am using A123 batteries that could be up to 120amps for 2 in parallel. Must the BMS be rated for the full 120 or would I go by the rated amps of the controller which in my

Re: [EVDL] BMS Master Controller

Hi Lee, Yes you are right, I was looking at commercially available BMS controllers such as Elithion and I thought that this is good but can do with more functionality such as power prediction for better energy management. I did think about the failure modes. So if you have a M/S topology and slave

Re: [EVDL] BMS Master Controller

bvgandhi via EV wrote: Thanks for sharing that Lee, I was trying to understand from the perspective of a heavy duty application something like a class 5 truck. I was wondering , for a pure EV application will an OEM use a Master Controller and expand it to encompass some of the major VCU function

Re: [EVDL] BMS Master Controller

Thanks for sharing that Lee, I was trying to understand from the perspective of a heavy duty application something like a class 5 truck. I was wondering , for a pure EV application will an OEM use a Master Controller and expand it to encompass some of the major VCU functions or would they build a s

Re: [EVDL] BMS Master Controller

bvgandhi via EV wrote: >> For a BMS of a large battery pack for an automotive application can >> I have all my slave boards connected to the cells and part of the >> pack and a master controller outside the battery pack where I can >> integrate some other control functionality as well? Cor van d

Re: [EVDL] BMS Master Controller

Sure, as long as the communication to the slave boards is isolated, preferably on the slave board itself. That way you just bring 12v plus communication bus to each slave. Almost every commercial bms works this way. OEM bms typically uses CAN bus. Cor. On Wed, Aug 8, 2018, 12:38 AM bvgandhi via EV

[EVDL] BMS Master Controller

For a BMS of a large battery pack for an automotive application can I have all my slave boards connected to the cells and part of the pack and a master controller outside the battery pack where I can integrate some other control functionality as well ? -- Sent from: http://electric-vehicle-discuss

Re: [EVDL] BMS by Battery Manufacturers

This is the one they sell with Bestgo batteries but I didn't buy it. http://www.ligoo.cn/en/about.asp?class_id=20071001 From: bvgandhi via EV To: ev@lists.evdl.org Cc: bvgandhi Sent: Tuesday, July 31, 2018 11:12 AM Subject: [EVDL] BMS by Battery Manufacturers Hi, Does anyone

[EVDL] BMS by Battery Manufacturers

Hi, Does anyone here have any experience using BMS developed by a battery manufacturer such as those provided by A123, LG Chem etc. Davide Andrea the founder of Elithion in his book on BMS design has mentioned that these guys try to rip you off. Anyone here has any opinion or perspective to offer

Re: [EVDL] BMS Sensor Selection

Hi Lee, Thanks for your insightful reply. I am trying to develop a BMS which can interact with my ADAS system controller. So I am trying to implement a power prediction capability. I wanted to ask you if you think can chalk out a criteria which I can use for selecting my temperature sensor for th

Re: [EVDL] BMS Sensor Selection

bvgandhi via EV wrote: Hi, I was trying to develop a BMS on my own. While I used the Elithion website to guide me through the ASIC selection for my slave board I am not sure as to how do I select my temperature and voltage sensor for an efficient circuit design. I am a mechanical engineer by voc

[EVDL] BMS Sensor Selection

Hi, I was trying to develop a BMS on my own. While I used the Elithion website to guide me through the ASIC selection for my slave board I am not sure as to how do I select my temperature and voltage sensor for an efficient circuit design. I am a mechanical engineer by vocation so I would really a

Re: [EVDL] BMS on Volt modules, Lots of 12v lithium batteries available.

    Hi Dan and All,    A solar boat is likely in my future too.  The voltage are normal for that type of cell, 49.5vdc top and 36 though under 39vdc, there is little energy left as it drops off a cliff.   So I'm using 39vdc as my lower cutoff though manual, it can be

[EVDL] Bms recommendations

Mini BMS there's no longer making their BMS headboards or sell boards. I looked on the eBay for BMS's and found one that could send information to an Android phone about the cells voltage's along with voltage of whole pack average voltage and current. They seem to be made for bicycles but they did

Re: [EVDL] BMS recommendation/ experiences?

Hi Philip, I talked to Mark from Thunderstruck some months ago about their BMS, it is a really nice equipment and very accessible on price. But I was unable to use it since it was on its end of development stage by then. But as reference, I can 100% recommend their EVCC (Charge controller) which

[EVDL] BMS recommendation/ experiences?

Hello, I've been driving my Dakota truck EV conversion for over 7 years, and finally pulled the plug & bought a lithium battery pack. (46 CALB cells, which should arrive this week!). Now I'm looking at BMS's, and am curious if anyone has any experience with the Thunderstruck BMS? ( http://www.thund

[EVDL] bms

http://www.electriccarpartscompany.com/72V-768V-864V-br-24-Cell-Battery-Series-br-15A-100A-Max-Charge-Discharge-Current-br-UL-SGS-and-UKAS-Certified-br-Custom-Built-Lithium-LiFePO4-LFP-br-PCB-PCM_p_601.html ___ UNSUBSCRIBE: http://www.evdl.org/help/ind

Re: [EVDL] BMS/PCM for upto 24 cells

On Mon, August 31, 2015 9:03 am, Cruisin via EV wrote: > I have a BMS for 24 Li-ion cells that provides cell balancing 24/7. Also > provides for charger cutoff to prevent overcharging and cutoff to prevent > over discharging. Available from crui...@live.com tell me more about it ? _

Re: [EVDL] BMS/PCM for upto 24 cells

I have a BMS for 24 Li-ion cells that provides cell balancing 24/7. Also provides for charger cutoff to prevent overcharging and cutoff to prevent over discharging. Available from crui...@live.com -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/BMS-

Re: [EVDL] BMS/PCM for upto 24 cells

What do you consider active balancing? MiniBMS has shunts that bleed off energy on the cells that reach a set voltage limit first. They aren't active as in moving charge from high cells to low cells, though. At least the older ones I've got don't have any adjustment capability. They do alarm

[EVDL] BMS/PCM for upto 24 cells

I'm looking for BMS/PCM for upto 24 cells that does active balancing and has some type of setable almarming if any cell goes below a set point . Orain junior only watches 16 cells . ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://list

Re: [EVDL] BMS/ leaf 60ah vs calb 60ah cells

On 29 Jun 2015 at 20:32, Willie2 via EV wrote: > I've had a GREAT many fail when not well protected. That's not good, but it's good to know. Thanks. David Roden - Akron, Ohio, USA EVDL Administrator = = = = = = = = = = = = = = = = = = = = = = = = = = = = = EVDL Information: http://www.evdl.or

Re: [EVDL] BMS/ leaf 60ah vs calb 60ah cells

On 06/29/2015 07:38 PM, EVDL Administrator via EV wrote: On 29 Jun 2015 at 22:43, Jay Summet via EV wrote: Here is the link to the MiniBMS units: http://minibms.mybigcommerce.com/minibms-cell-module/ You buy the 4.2 volt - LiNMC cells ( Leaf, Volt, etc ) option. Are those pc boards conformal

Re: [EVDL] BMS/ leaf 60ah vs calb 60ah cells

On 29 Jun 2015 at 22:43, Jay Summet via EV wrote: > Here is the link to the MiniBMS units: > http://minibms.mybigcommerce.com/minibms-cell-module/ > > You buy the 4.2 volt - LiNMC cells ( Leaf, Volt, etc ) option. Are those pc boards conformal coated? They look kind of naked. David Roden - Akr

Re: [EVDL] BMS/ leaf 60ah vs calb 60ah cells

-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Here is the link to the MiniBMS units: http://minibms.mybigcommerce.com/minibms-cell-module/ You buy the 4.2 volt - LiNMC cells ( Leaf, Volt, etc ) option. Jay On 06/29/2015 06:21 PM, ken via EV wrote: > Is there anohter BMS to use for leafs cells

Re: [EVDL] BMS/ leaf 60ah vs calb 60ah cells

Solutions Inclusive / SSI-Racing -Original Message- From: ken via EV Sent: Monday, June 29, 2015 9:21 AM To: damon henry ; Electric Vehicle Discussion List Subject: [EVDL] BMS/ leaf 60ah vs calb 60ah cells Is there anohter BMS to use for leafs cells dicides orion? for like

[EVDL] BMS/ leaf 60ah vs calb 60ah cells

Is there anohter BMS to use for leafs cells dicides orion? for like 125 volts? ___ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yaho

Re: [EVDL] BMS

via EV wrote: > > I have a Ethilon BMS unit with harness for 48 cells. > If anyone could use this I'll deal11 > -- next part -- > An HTML attachment was scrubbed... > URL: >

Re: [EVDL] BMS

It's in San Diego and I was asking half retail. On Fri, Sep 26, 2014 at 3:32 PM, via EV wrote: > > I have a Ethilon BMS unit with harness for 48 cells. > If anyone could use this I'll deal11 > -- next part -- > An HTML attachment was scrubbed... > URL: > < > http://lists

[EVDL] BMS

I have a Ethilon BMS unit with harness for 48 cells. If anyone could use this I'll deal11 -- next part -- An HTML attachment was scrubbed... URL: ___

Re: [EVDL] BMS

How much for the BMS and where is it at? -- View this message in context: http://electric-vehicle-discussion-list.413529.n4.nabble.com/BMS-tp4671780p4671783.html Sent from the Electric Vehicle Discussion List mailing list archive at Nabble.com. ___ U

[EVDL] BMS

I have a Ethilon BMS unit with harness for 48 cells. If anyone could use this I'll deal11 -- next part -- An HTML attachment was scrubbed... URL: ___

Re: [EVDL] BMS for leaf cells

Sorry, I see I typo'ed 3/18 should be 3./18. JR talks about the LiMn chemistry from the POV of what voltages to use with BB'ing, and why he thinks BB'ing is appropriate. There is a lot of good information about how the Leaf packs he has are constructed. It sounds like he doesn't expect the 80% l

Re: [EVDL] BMS for leaf cells

Hi Lawrence, You might have a look at this... http://liionbms.com/php/bms-selector.php I don't know how up to date it is... it is also provided by Elithion who make the Lithiumate Lite & Pro BMMS', so not exactly unbiased, but it seems pretty fair to me! Regards, MW. On 3 Apr 2014, at 18:37,

Re: [EVDL] BMS for leaf cells

Lawrence, You might want to give - http://www.orionbms.com/ - a call. I am using their BMS and am very impressed. Not only with the unit but also the support. I do not use it with a Leaf battery but the website does say it works with LiMn2O2. My price was less than $1,500.00. It is pretty sl

Re: [EVDL] BMS for leaf cells

On 3 Apr 2014 at 18:45, Michael Ross wrote: > A DIY'er might consider bottom balancing. Hmm, these are not the inherently safer LiFePO4 batteries. The Leaf uses lithium manganese, IIRC. There seems to be an almost religious fervor among some proponents of bottom balancing, particularly some

Re: [EVDL] BMS for leaf cells

x203 -Original Message- From: ev-boun...@lists.evdl.org on behalf of Lawrence Rhodes Sent: Thu 4/3/2014 5:58 PM To: Electric Vehicle Discussion List Subject: Re: [EVDL] BMS for leaf cells Can one regulator monitor multiple cells in parallel?  That is if you have four strings of twenty

Re: [EVDL] BMS for leaf cells

Thursday, April 3, 2014 11:55 AM >Subject: Re: [EVDL] BMS for leaf cells > > >On Thu, Apr 3, 2014 at 10:37 AM, Lawrence Rhodes > > wrote: >> I got a deal for a Leaf pack for 2500 dollars.  However I've gotten an >> estimate for >> thousands for

Re: [EVDL] BMS for leaf cells

A DIY'er might consider bottom balancing. EVTV is doing just that with multiple Leaf packs they picked up from Israel. I think the 3/21 episode covers this a bit. I have not watched 3/18 yet. http://www.evtv.me.s3-website-us-east-1.amazonaws.com/vidarch.html On Thu, Apr 3, 2014 at 2:55 PM, Da

Re: [EVDL] BMS for leaf cells

On Thu, Apr 3, 2014 at 10:37 AM, Lawrence Rhodes wrote: > I got a deal for a Leaf pack for 2500 dollars. However I've gotten an > estimate for > thousands for the BMS. Is there a reliable BMS I don't have to spend > thousands > on? Will be dividing up the pack into strings of parallel and ser

[EVDL] BMS for leaf cells

I got a deal for a Leaf pack for 2500 dollars.  However I've gotten an estimate for thousands for the BMS.  Is there a reliable BMS I don't have to spend thousands on?  Will be dividing up the pack into strings of parallel and series to  make 156vdc after charging.  Also with Curtis controllers

[EVDL] BMS controlling pot box

From: Lee Hart > I thought I would ask again for any explanation on how the 0-5k pot > works on the zilla to increase voltage (counter-intuitive) > and how does the BMS affect that by reducing voltage? I just installed a orion BMS for a guy with a wv buss before leaving Florida and wrote a post