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Finally found a LiFePO4 BMS with Low-temp Charging Protection

emeraldcoastcamper said:
Thank you. I need to print the pdf manual from their web site for the pin out.
Say. Another question. My CATL cells arrived today and I think they are either used or bad. 2.83 to 2.94 volts was the range over 8 cells. That’s dead...right. They were advertised new.
Click to expand...
Take a Video of you testing the Voltage that shows the meter readouts.
 
Sgt Raven said:
Go to the Amazon link you posted and scroll down. It has a picture of the pin out of the JST-XH plug/socket....

You can find JST-XH extension cables on Amazon. Most are 22AWG, but some are 20AWG. Get a few of them, cut one end off for hookup to the battery and use another it move the meter away from the pack, if you need to. Just plug it into the meter and cut the other end off.

That's not right on the cells.... Where/who did you get them?
Click to expand...
Deli green. April Cao.
 
Squirrelcop said:
Quick question from a newbie. I have decided to jump in and built a 200ah battery pack using everything from Will’s $555 video for use in our 5th wheel trailer Instead of buying the Battleborn batteries. I did upgrade to the 4S 120a BMS And seem to have gotten everything put together and working. I downloaded the Xiaoxiang BMS app for my iPad/ iPhone, paid the $6 upgrade, and it instantly connected and works perfectly. My question is about the app and the parameter settings I should use for these batteries. The app has clearly been updated to a newer version, which is why I’m a bit lost as it does not look like the one Will was adjusting. I did figure out how to change and save the ‘designated capacity’ to 200k mAh, but that’s about all I know. If somebody who knows these LiFEPO4 battery parameters could please help me adjust whatever other parameters need adjusting I’d really appreciate it. It should be as simple as changing the numbers, clicking ‘save configuratio’ button then clicking the ‘BMS write’ button. I hope !! I’ll include photos of what the updated app screens look like and it’s current default settings. Thank you much
Click to expand...
Another question from same newbie... I connected the new converter/charger I will be using in my travel trailer ( IOTA DLS-75 w/
IOTA IQ-LIFEPO Charge Controller ) up to my new battery bank to see how the charging cycle goes. When I initially constructed the pack all (8) batteries measured 3.29 volts each so I assumed they were likely a matched set and proceeded forward without any balancing. After charging for a couple hours I began to get “cell over voltage“ alerts due to the #4 cell continuously going into over voltage and the BMS shutting off charging. Once the voltage on cell #4 drops below 3.5 volts the charging starts again only to shut off within a second or two for the same reason. So on the bright Side of things the BMS appears to be protecting the battery as designed, however I’m curious as to this continued ‘cell over voltage’ and if it’s because I’ve got something possibly wired up incorrectly or something else I might have screwed up. As you can see in my picture the positive charge cable is connected to cell #4. Not sure if this is the cause of my problem of not. Any help or advice would be great. Thank you
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It can take days or even weeks for the BMS to balance the cells, I wouldn't worry for now ;)

BTW you should place the busbar which is between the pairs of cells 2 and 3 on the other terminals (left most side on the picture) so the cells 2a and 2b (and 3a and 3b) receive an equal current.
 
BiduleOhm said:
It can take days or even weeks for the BMS to balance the cells, I wouldn't worry for now ;)

BTW you should place the busbar which is between the pairs of cells 2 and 3 on the other terminals (left most side on the picture) so the cells 2a and 2b (and 3a and 3b) receive an equal current.
Click to expand...
Perfect, will switch the busbar to the other terminals. Should I toggle the switch that allows the BMS to balance when it’s ‘not charging’. It’s default setting is balancing while charging and not balancing when not charging... both can be toggled on/off
 
NB: disconnect the balance wires connector of the BMS before doing the busbar swap.

You can, it should accelerate the balancing but probably not by much given the flat discharge curve of LFP batteries. You can also just wait a few days to see if the cells are more balanced than now.
 
BiduleOhm said:
It can take days or even weeks for the BMS to balance the cells, I wouldn't worry for now ;)

BTW you should place the busbar which is between the pairs of cells 2 and 3 on the other terminals (left most side on the picture) so the cells 2a and 2b (and 3a and 3b) receive an equal current.
Click to expand...
It would be nice if we could get two 4 pole straight and a square 4 pole bus bar along with the 2 pole ones. The square one could have the center cut out.
 
emeraldcoastcamper said:
Thank you. I need to print the pdf manual from their web site for the pin out.
Say. Another question. My CATL cells arrived today and I think they are either used or bad. 2.83 to 2.94 volts was the range over 8 cells. That’s dead...right. They were advertised new.
Click to expand...
No not dead but close to fully discharged. What is the spec bottom cell cutoff voltage for those cells? Usually it is 2.5 V so charge and balance and test.
 
Hello, I am using this bms with the fortune 100ah batteries to power my trolling motor on my kayak. My question is could someone help with difference in static balance and charge balance found the answers thanks
 
Last edited:
Hi guys,
I just installed my new BMS on the battery yesterday. Everything seems to work fine. The problem I have is with the bluetooth application. It's all in chinese. There must be a way to change the language to english.
I tried these two versions and there doing the same thing:
xiaoxiang-protection-enterprise.apk
xiaoxiang-protection-enterprise__1_.apk
Denis
 
Read through the first five pages but have not got to page 23 yet, so I'll just ask.....has anyone downloaded the Apple App (called Xiaoxiang BMS) for this BMS and successfully used it with your iPhone? Thanks!
 
Calothrix said:
Read through the first five pages but have not got to page 23 yet, so I'll just ask.....has anyone downloaded the Apple App (called Xiaoxiang BMS) for this BMS and successfully used it with your iPhone? Thanks!
Click to expand...
I don't have an iPhone, but have read you want the Enterprise paid version....
The free iOS app is restricted on what you can do. IIIRC the paid version is $5-6 USD...
 
Sgt Raven said:
I don't have an iPhone, but have read you want the Enterprise paid version....
The free iOS app is restricted on what you can do. IIIRC the paid version is $5-6 USD...
Click to expand...
Sgt Raven said:
I don't have an iPhone, but have read you want the Enterprise paid version....
The free iOS app is restricted on what you can do. IIIRC the paid version is $5-6 USD...
Click to expand...
Have the phone app. Works perfectly
 
Calothrix said:
Read through the first five pages but have not got to page 23 yet, so I'll just ask.....has anyone downloaded the Apple App (called Xiaoxiang BMS) for this BMS and successfully used it with your iPhone? Thanks!
Click to expand...
Yes using it right now. No issues at all
 
Calothrix said:
Read through the first five pages but have not got to page 23 yet, so I'll just ask.....has anyone downloaded the Apple App (called Xiaoxiang BMS) for this BMS and successfully used it with your iPhone? Thanks!
Click to expand...

Not sure if it is this BMS or not since it came in my battery ..... but I am using the Apple app and my BMS seems to have all the characteristics of this one.
As @Sgt Raven said you need the pro version to have full funtionality. I think the App advised me of that if I remember correctly
 
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