Finally found a LiFePO4 BMS with Low-temp Charging Protection

[Will Prowse]

Spent the last few days and tonight testing BMS:

1. The "new" daly LiFePO4 BMS (that states in the data sheet that it has low temp charging protection) does not have low temp charging protection. And yes, it has a temp sensor attached. This disappointed me big time. Video to come.

2. Next, I programmed/tested this BMS for a couple of days:


And it failed. App would crash. Default low temp cut off was -5 degrees C. No manual and very difficult to work with. Had a lot of issues with it. Will cover every downside in my upcoming video. Avoid this BMS.


3. Then I tested the battery hook up 100A BMS that arrived this afternoon:

And low temp cut off was programmable and worked perfectly. Bluetooth connected perfectly as well. I was excited so I did a load test of 200Wh with 90-102A continious. Passed with flying colors, then pushed it passed its limit and it disconnected the loads. Heatsink stayed warm and did not heat up excessively.

I'll make a long video covering all these things and the testing methods, but I am going to go with this bms from now on. I am so tired of other bms failing. The battery hookup one is used on medical devices as well, which I need more information on.

The number one most important thing to know when using this bms is that you need the proper app. The app on the website is NOT what you want. You need the "enterprise" version:
Click Here for APK of enterprise BMS program app

Send it to your phone with an email (not gmail), then install in on your phone, then connect to bms.

Then go to parameter settings and change the low temp charging cut off to 2 degrees Celsius. Then the reconnect voltage to 5 degrees Celsius.

You can buy this bms from overkill solar: https://www.mobile-solarpower.com/raw-lifepo4-deals-page-676969.html

Biggest downside of this bms is 2x 10 gauge wires at P- and B-. But it has a hole and solder tabs for adding more wires.

Just wanted you guys to know about all this before you waste your money on the first 2 bms. I wasted $150 on those bms and they were a total rip off. The new bms seems to kick butt, so videos to come.

 

[Steve_S]

Too bad they only offer a 4S / 100A model, hopefully they can source a few other models as well.

 

[Woggs1]

Thanks Will, I just ordered one, and thanks for the 10% off.

 

[Steve_S]

@Will Prowse I hope you don't mind but I forwarded the info from here & your youtube channel to Jason Wang @ Chargery and suggested to him that they should send you some BMS Goodies to play with. I know your bored to death and twiddling your thumbs. I also suggested they consider adding a LOW TEMP Cutoff as that simple additional function would likely boost their sales by a significant margin. Half the world is subject to low temp issues, so it goes.

 

[astronom]

Spent the last few days and tonight testing BMS:

1. The "new" daly LiFePO4 BMS (that states in the data sheet that it has low temp charging protection) does not have low temp charging protection. And yes, it has a temp sensor attached. This disappointed me big time. Video to come.

2. Next, I programmed/tested this BMS for a couple of days:
View attachment 4222

And it failed. App would crash. Default low temp cut off was -5 degrees C. No manual and very difficult to work with. Had a lot of issues with it. Will cover every downside in my upcoming video. Avoid this BMS.


3. Then I tested the battery hook up 100A BMS that arrived this afternoon:
View attachment 4223
And low temp cut off was programmable and worked perfectly. Bluetooth connected perfectly as well. I was excited so I did a load test of 200Wh with 90-102A continious. Passed with flying colors, then pushed it passed its limit and it disconnected the loads. Heatsink stayed warm and did not heat up excessively.

I'll make a long video covering all these things and the testing methods, but I am going to go with this bms from now on. I am so tired of other bms failing. The battery hookup one is used on medical devices as well, which I need more information on.

The number one most important thing to know when using this bms is that you need the proper app. The app on the website is NOT what you want. You need the "enterprise" version:
Click Here for APK of enterprise BMS program app

Send it to your phone with an email (not gmail), then install in on your phone, then connect to bms.

Then go to parameter settings and change the low temp charging cut off to 2 degrees Celsius. Then the reconnect voltage to 5 degrees Celsius.

You can buy this bms by clicking here (my affiliate link) and the coupon code is "SOLAR" for 10% off. I am going to get a 8s model and build a big system with it. I like this bms a lot, so will be testing it like crazy. I also will make a DIY video on how to use it in the next couple days (possibly tomorrow if I get enough sleep tonight).

Biggest downside of this bms is 2x 10 gauge wires at P- and B-. But it has a hole and solder tabs for adding more wires.

Just wanted you guys to know about all this before you waste your money on the first 2 bms. I wasted $150 on those bms and they were a total rip off. The new bms seems to kick butt, so videos to come.

Wow thanks for all this already, this third BMS looks super promising! You're talking about an 8s version of it, but where can we buy it? Batteryhookup seems to only sell the 4s version yet. And what about a 16s model?

 

[MrNatural22]

@Will Prowse I tried sending to email (hotmail not gmail) tried download app and get message on my IPhone “does not support file type.” Is this only downloadable on an android phone?

 

[Will Prowse]

Wow thanks for all this already, this third BMS looks super promising! You're talking about an 8s version of it, but where can we buy it? Batteryhookup seems to only sell the 4s version yet. And what about a 16s model?

8s not available yet. Tom said he is still waiting for that shipment. Tom and I were messing with it last night and testing every aspect of this bms. We have been trying out various bms for months now. We really though the daly would have the low temp cut off on the new model with the temp sensor.

And 16s model, I am not sure about. You could use 2x 8s models in series for 16s. That would work.

 

[Will Prowse]

@Will Prowse I tried sending to email (hotmail not gmail) tried download app and get message on my IPhone “does not support file type.” Is this only downloadable on an android phone?

I have only used android for programming these units. I will try to find a apple version. Not sure if one exists. Many of these bms apps from china support mainly android. Sounds silly, but if you go on their main website, I do not see the apple version anywhere. I will try to ask tom to ask the supplier and see what they can do.

 

[Bob B]

I'm think that is the same BMS that came with the 100 AH battery I ordered from Sendon. There is an app on the apple store called xiaoxiang bms.

In order to be able to adjust paramaters I had to upgrade to the Pro Version which cost $5.99. They sent me a "new" app for Iphone and the interface looks like Will's screenshot. but it was in Chinese and I couldn't figure out how to change it to English. They told me there is a way to do it, but I couldn't figure it out......The other app is working fine for me.

The paramaters are there in this app for the low temp cutoff, but I haven't fully tested that part of the functionality yet.

I have been VERY tempted to take this battery apart because I may want to order more but haven't got up the nerve to do it yet.

I have had one glitch with this App. Every time I go into the Config section it prompts me to buy the Pro version .... and I have to Restore purchases and then it works fine. I'd be very interested if Will can find the English version of the "new" app.

 

[_a1_]

Thank you Will I watched your two last vids and you didn't mention it, glad I registered and found it here (it was me that mentioned -5c and you said it'll be in a coming vid)

I'm finding that the enterprise version seems a little more unreliable than the regular one and has more chinese, but I can use that for setting and the other for monitoring. The settings stick when changing apps.

Now if only they would include notifications, say for under temp, cell over/under voltage etc this would be even more perfect!!

 

[Dzl]

@Will Prowse I tried sending to email (hotmail not gmail) tried download app and get message on my IPhone “does not support file type.” Is this only downloadable on an android phone?

Yes, APK's are just for android. I'm not sure Apple lets you install apps manually like this from 'unknown sources' and if they do it would be a different file format than APKs (which stand for Android PacKage)

 

[Waspvl1]

@Will Prowse I watched your video when you were testing the low temperature cut off on the Daly BMS and each time you tested the temp of what you were using, it was around negative 3 degrees Celsius. If the cutoff is negative 5 degrees Celsius, maybe it just didn't get cold enough. Thought?

 

[Max Bender]

From the manufacturers website https://www.lithiumbatterypcb.com/p...e-and-e-scooter-protection-2-2-3-2-2-2-2-2-3/

 

[Max Bender]

100amp 8s w/bluetooth $87 https://www.lithiumbatterypcb.com/p...-with-80a-to-120a-constant-discharge-current/

 

[Max Bender]

150amp 16s w/bluetooth $141 https://www.lithiumbatterypcb.com/p...oth-bms-with-100a-constant-discharge-current/

 

[Stupid Monkey]

Just cancelled my Daly BMS order (200A seperate port) and ordered one of these with your discount code @Will Prowse thanks!

Luckily still verifying my AliExpress account, so order was still pending along with the BLS battery order. I'm planning on using the inverter via the Victron 220A disconnect so can manage with"only" 100A for charging. Especially as I don't think i need as many panels as i first thought, wanting the batteries to cycle and not just sit on float ..... my current setup mainly floats, but also the genny gets used for larger loads and running events. Hoping to ditch the genny!

 

[astronom]

150amp 16s w/bluetooth $141 https://www.lithiumbatterypcb.com/p...oth-bms-with-100a-constant-discharge-current/

View attachment 4302

Thanks for the 16s version!

However these specs don't look so nice regarding the low temp charging cut-off. It seems to cut at -7°C for the warmest setting and it cannot even be changed by the user... I would prefer to have it set at 0°C at minimum and rather +5°C. But hopefully Will's test will show what exactly these BMS are capable of beyond the spec sheet

 

[Stupid Monkey]

I would prefer to have it set at 0°C at minimum and rather +5°C. But hopefully Will's test will show what exactly these BMS are capable of beyond the spec sheet

Isnt that why you need the enterprise version of the software? to change that temp?

The number one most important thing to know when using this bms is that you need the proper app. The app on the website is NOT what you want. You need the "enterprise" version:
Click Here for APK of enterprise BMS program app

From https://batteryhookup.com/collections/smart-bms/products/12v-lifepo4-smart-bms-w-low-temp-cutoff

Cell phone app download link below
xiaoxiang-protection-enterprise.apk
--------------------------
Here are brand new, 4s lifepo4 100a SMART BMS units with Bluetooth included. This BMS has low temperature cutoff which is programmable. You can set all the parameters, over charge, over discharge, low temp cutoff, etc directly from your smart phone.

 

[astronom]

Isnt that why you need the enterprise version of the software? to change that temp?

The number one most important thing to know when using this bms is that you need the proper app. The app on the website is NOT what you want. You need the "enterprise" version:
Click Here for APK of enterprise BMS program app

From https://batteryhookup.com/collections/smart-bms/products/12v-lifepo4-smart-bms-w-low-temp-cutoff

Cell phone app download link below
xiaoxiang-protection-enterprise.apk
--------------------------
Here are brand new, 4s lifepo4 100a SMART BMS units with Bluetooth included. This BMS has low temperature cutoff which is programmable. You can set all the parameters, over charge, over discharge, low temp cutoff, etc directly from your smart phone.

Oh alright if it's the case and the enterprise app unlocks all the settings then it looks great, I lost sight of that.

 

[Max Bender]

Thanks for the 16s version!

However these specs don't look so nice regarding the low temp charging cut-off. It seems to cut at -7°C for the warmest setting and it cannot even be changed by the user... I would prefer to have it set at 0°C at minimum and rather +5°C. But hopefully Will's test will show what exactly these BMS are capable of beyond the spec sheet

Will HAS tested the BMS, and the BMS passed the test. What then is the basis of your claim when both BMS's are from the same manufacturer and use the same programming software? Download and install the app and you'll see for yourself that the cut-off temps are indeed user adjustable.